am 0e1595c1
: Handle unexpected deletion of EmailProvider database
Merge commit '0e1595c177e40428b267a8696dfc05d015ce6a2f' into eclair-mr2-plus-aosp * commit '0e1595c177e40428b267a8696dfc05d015ce6a2f': Handle unexpected deletion of EmailProvider database
This commit is contained in:
commit
9dc9f44ba3
@ -44,18 +44,23 @@ import android.content.UriMatcher;
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import android.database.Cursor;
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import android.database.SQLException;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteException;
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import android.database.sqlite.SQLiteOpenHelper;
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import android.net.Uri;
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import android.util.Log;
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import java.io.File;
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import java.util.ArrayList;
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public class EmailProvider extends ContentProvider {
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private static final String TAG = "EmailProvider";
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private static final String DATABASE_NAME = "EmailProvider.db";
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private static final String BODY_DATABASE_NAME = "EmailProviderBody.db";
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protected static final String DATABASE_NAME = "EmailProvider.db";
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protected static final String BODY_DATABASE_NAME = "EmailProviderBody.db";
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public static final Uri INTEGRITY_CHECK_URI =
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Uri.parse("content://" + EmailContent.AUTHORITY + "/integrityCheck");
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// Definitions for our queries looking for orphaned messages
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private static final String[] ORPHANS_PROJECTION
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@ -65,6 +70,8 @@ public class EmailProvider extends ContentProvider {
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private static final String WHERE_ID = EmailContent.RECORD_ID + "=?";
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private static final String[] COUNT_COLUMNS = new String[]{"count(*)"};
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// Any changes to the database format *must* include update-in-place code.
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// Original version: 3
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// Version 4: Database wipe required; changing AccountManager interface w/Exchange
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@ -543,9 +550,15 @@ public class EmailProvider extends ContentProvider {
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private SQLiteDatabase mBodyDatabase;
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public synchronized SQLiteDatabase getDatabase(Context context) {
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if (mDatabase != null) {
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// Always return the cached database, if we've got one
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if (mDatabase != null) {
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return mDatabase;
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}
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// Whenever we create or re-cache the databases, make sure that we haven't lost one
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// to corruption
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checkDatabases();
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DatabaseHelper helper = new DatabaseHelper(context, DATABASE_NAME);
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mDatabase = helper.getWritableDatabase();
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if (mDatabase != null) {
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@ -626,7 +639,7 @@ public class EmailProvider extends ContentProvider {
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@Override
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public void onCreate(SQLiteDatabase db) {
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// Create all tables here; each class has its own method
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Log.d(TAG, "Creating EmailProviderBody database");
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createBodyTable(db);
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}
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@ -650,6 +663,7 @@ public class EmailProvider extends ContentProvider {
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@Override
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public void onCreate(SQLiteDatabase db) {
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Log.d(TAG, "Creating EmailProvider database");
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// Create all tables here; each class has its own method
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createMessageTable(db);
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createAttachmentTable(db);
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@ -797,6 +811,9 @@ public class EmailProvider extends ContentProvider {
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}
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db.setTransactionSuccessful();
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}
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} catch (SQLiteException e) {
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checkDatabases();
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throw e;
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} finally {
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if (messageDeletion) {
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db.endTransaction();
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@ -860,51 +877,56 @@ public class EmailProvider extends ContentProvider {
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Uri resultUri = null;
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switch (match) {
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case UPDATED_MESSAGE:
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case DELETED_MESSAGE:
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case BODY:
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case MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
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id = db.insert(TABLE_NAMES[table], "foo", values);
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resultUri = ContentUris.withAppendedId(uri, id);
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// Clients shouldn't normally be adding rows to these tables, as they are
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// maintained by triggers. However, we need to be able to do this for unit
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// testing, so we allow the insert and then throw the same exception that we
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// would if this weren't allowed.
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if (match == UPDATED_MESSAGE || match == DELETED_MESSAGE) {
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try {
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switch (match) {
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case UPDATED_MESSAGE:
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case DELETED_MESSAGE:
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case BODY:
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case MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
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id = db.insert(TABLE_NAMES[table], "foo", values);
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resultUri = ContentUris.withAppendedId(uri, id);
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// Clients shouldn't normally be adding rows to these tables, as they are
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// maintained by triggers. However, we need to be able to do this for unit
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// testing, so we allow the insert and then throw the same exception that we
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// would if this weren't allowed.
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if (match == UPDATED_MESSAGE || match == DELETED_MESSAGE) {
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throw new IllegalArgumentException("Unknown URL " + uri);
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}
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break;
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case MAILBOX_ID:
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// This implies adding a message to a mailbox
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// Hmm, a problem here is that we can't link the account as well, so it must be
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// already in the values...
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(MessageColumns.MAILBOX_KEY, id);
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resultUri = insert(Message.CONTENT_URI, values);
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break;
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case MESSAGE_ID:
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// This implies adding an attachment to a message.
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(AttachmentColumns.MESSAGE_KEY, id);
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resultUri = insert(Attachment.CONTENT_URI, values);
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break;
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case ACCOUNT_ID:
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// This implies adding a mailbox to an account.
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(MailboxColumns.ACCOUNT_KEY, id);
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resultUri = insert(Mailbox.CONTENT_URI, values);
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break;
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case ATTACHMENTS_MESSAGE_ID:
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id = db.insert(TABLE_NAMES[table], "foo", values);
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resultUri = ContentUris.withAppendedId(Attachment.CONTENT_URI, id);
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break;
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default:
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throw new IllegalArgumentException("Unknown URL " + uri);
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}
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break;
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case MAILBOX_ID:
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// This implies adding a message to a mailbox
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// Hmm, one problem here is that we can't link the account as well, so it must be
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// already in the values...
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(MessageColumns.MAILBOX_KEY, id);
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resultUri = insert(Message.CONTENT_URI, values);
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break;
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case MESSAGE_ID:
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// This implies adding an attachment to a message.
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(AttachmentColumns.MESSAGE_KEY, id);
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resultUri = insert(Attachment.CONTENT_URI, values);
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break;
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case ACCOUNT_ID:
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// This implies adding a mailbox to an account.
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id = Long.parseLong(uri.getPathSegments().get(1));
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values.put(MailboxColumns.ACCOUNT_KEY, id);
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resultUri = insert(Mailbox.CONTENT_URI, values);
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break;
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case ATTACHMENTS_MESSAGE_ID:
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id = db.insert(TABLE_NAMES[table], "foo", values);
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resultUri = ContentUris.withAppendedId(Attachment.CONTENT_URI, id);
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break;
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default:
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throw new IllegalArgumentException("Unknown URL " + uri);
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}
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} catch (SQLiteException e) {
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checkDatabases();
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throw e;
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}
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// Notify with the base uri, not the new uri (nobody is watching a new record)
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@ -914,10 +936,38 @@ public class EmailProvider extends ContentProvider {
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@Override
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public boolean onCreate() {
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// TODO Auto-generated method stub
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checkDatabases();
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return false;
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}
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/**
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* The idea here is that the two databases (EmailProvider.db and EmailProviderBody.db must
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* always be in sync (i.e. there are two database or NO databases). This code will delete
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* any "orphan" database, so that both will be created together. Note that an "orphan" database
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* will exist after either of the individual databases is deleted due to data corruption.
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*/
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public void checkDatabases() {
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// Uncache the databases
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if (mDatabase != null) {
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mDatabase = null;
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}
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if (mBodyDatabase != null) {
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mBodyDatabase = null;
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}
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// Look for orphans, and delete as necessary; these must always be in sync
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File databaseFile = getContext().getDatabasePath(DATABASE_NAME);
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File bodyFile = getContext().getDatabasePath(BODY_DATABASE_NAME);
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// TODO Make sure attachments are deleted
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if (databaseFile.exists() && !bodyFile.exists()) {
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Log.w(TAG, "Deleting orphaned EmailProvider database...");
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databaseFile.delete();
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} else if (bodyFile.exists() && !databaseFile.exists()) {
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Log.w(TAG, "Deleting orphaned EmailProviderBody database...");
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bodyFile.delete();
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}
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}
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@Override
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public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
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String sortOrder) {
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@ -934,39 +984,44 @@ public class EmailProvider extends ContentProvider {
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Log.v(TAG, "EmailProvider.query: uri=" + uri + ", match is " + match);
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}
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switch (match) {
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case BODY:
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case MESSAGE:
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case UPDATED_MESSAGE:
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case DELETED_MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
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c = db.query(TABLE_NAMES[table], projection,
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selection, selectionArgs, null, null, sortOrder);
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break;
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case BODY_ID:
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case MESSAGE_ID:
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case DELETED_MESSAGE_ID:
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case UPDATED_MESSAGE_ID:
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case ATTACHMENT_ID:
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case MAILBOX_ID:
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case ACCOUNT_ID:
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case HOSTAUTH_ID:
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id = uri.getPathSegments().get(1);
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c = db.query(TABLE_NAMES[table], projection,
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whereWithId(id, selection), selectionArgs, null, null, sortOrder);
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break;
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case ATTACHMENTS_MESSAGE_ID:
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// All attachments for the given message
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id = uri.getPathSegments().get(2);
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c = db.query(Attachment.TABLE_NAME, projection,
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whereWith(Attachment.MESSAGE_KEY + "=" + id, selection),
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selectionArgs, null, null, sortOrder);
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break;
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default:
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throw new IllegalArgumentException("Unknown URI " + uri);
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try {
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switch (match) {
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case BODY:
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case MESSAGE:
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case UPDATED_MESSAGE:
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case DELETED_MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
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c = db.query(TABLE_NAMES[table], projection,
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selection, selectionArgs, null, null, sortOrder);
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break;
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case BODY_ID:
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case MESSAGE_ID:
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case DELETED_MESSAGE_ID:
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case UPDATED_MESSAGE_ID:
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case ATTACHMENT_ID:
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case MAILBOX_ID:
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case ACCOUNT_ID:
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case HOSTAUTH_ID:
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id = uri.getPathSegments().get(1);
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c = db.query(TABLE_NAMES[table], projection,
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whereWithId(id, selection), selectionArgs, null, null, sortOrder);
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break;
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case ATTACHMENTS_MESSAGE_ID:
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// All attachments for the given message
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id = uri.getPathSegments().get(2);
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c = db.query(Attachment.TABLE_NAME, projection,
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whereWith(Attachment.MESSAGE_KEY + "=" + id, selection),
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selectionArgs, null, null, sortOrder);
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break;
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default:
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throw new IllegalArgumentException("Unknown URI " + uri);
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}
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} catch (SQLiteException e) {
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checkDatabases();
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throw e;
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}
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if ((c != null) && !isTemporary()) {
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@ -1028,68 +1083,80 @@ public class EmailProvider extends ContentProvider {
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values.remove(MailboxColumns.UNREAD_COUNT);
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}
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// Handle this special case the fastest possible way
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if (uri == INTEGRITY_CHECK_URI) {
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checkDatabases();
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return 0;
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}
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String id;
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switch (match) {
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case MAILBOX_ID_ADD_TO_FIELD:
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case ACCOUNT_ID_ADD_TO_FIELD:
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db.beginTransaction();
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id = uri.getPathSegments().get(1);
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String field = values.getAsString(EmailContent.FIELD_COLUMN_NAME);
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Long add = values.getAsLong(EmailContent.ADD_COLUMN_NAME);
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if (field == null || add == null) {
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throw new IllegalArgumentException("No field/add specified " + uri);
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}
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Cursor c = db.query(TABLE_NAMES[table],
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new String[] {EmailContent.RECORD_ID, field}, whereWithId(id, selection),
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selectionArgs, null, null, null);
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try {
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result = 0;
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ContentValues cv = new ContentValues();
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String[] bind = new String[1];
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while (c.moveToNext()) {
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bind[0] = c.getString(0);
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long value = c.getLong(1) + add;
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cv.put(field, value);
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result = db.update(TABLE_NAMES[table], cv, ID_EQUALS, bind);
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try {
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switch (match) {
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case MAILBOX_ID_ADD_TO_FIELD:
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case ACCOUNT_ID_ADD_TO_FIELD:
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db.beginTransaction();
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id = uri.getPathSegments().get(1);
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String field = values.getAsString(EmailContent.FIELD_COLUMN_NAME);
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Long add = values.getAsLong(EmailContent.ADD_COLUMN_NAME);
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if (field == null || add == null) {
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throw new IllegalArgumentException("No field/add specified " + uri);
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}
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} finally {
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c.close();
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}
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db.setTransactionSuccessful();
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db.endTransaction();
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break;
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case BODY_ID:
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case MESSAGE_ID:
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case SYNCED_MESSAGE_ID:
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case UPDATED_MESSAGE_ID:
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case ATTACHMENT_ID:
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case MAILBOX_ID:
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case ACCOUNT_ID:
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case HOSTAUTH_ID:
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id = uri.getPathSegments().get(1);
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if (match == SYNCED_MESSAGE_ID) {
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// For synced messages, first copy the old message to the updated table
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// Note the insert or ignore semantics, guaranteeing that only the first
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// update will be reflected in the updated message table; therefore this row
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// will always have the "original" data
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db.execSQL(UPDATED_MESSAGE_INSERT + id);
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} else if (match == MESSAGE_ID) {
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db.execSQL(UPDATED_MESSAGE_DELETE + id);
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}
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result = db.update(TABLE_NAMES[table], values, whereWithId(id, selection),
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selectionArgs);
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break;
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case BODY:
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case MESSAGE:
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case UPDATED_MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
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result = db.update(TABLE_NAMES[table], values, selection, selectionArgs);
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break;
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default:
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throw new IllegalArgumentException("Unknown URI " + uri);
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Cursor c = db.query(TABLE_NAMES[table],
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new String[] {EmailContent.RECORD_ID, field},
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whereWithId(id, selection),
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selectionArgs, null, null, null);
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try {
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result = 0;
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ContentValues cv = new ContentValues();
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String[] bind = new String[1];
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while (c.moveToNext()) {
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bind[0] = c.getString(0);
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long value = c.getLong(1) + add;
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cv.put(field, value);
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result = db.update(TABLE_NAMES[table], cv, ID_EQUALS, bind);
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}
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} finally {
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c.close();
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}
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db.setTransactionSuccessful();
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db.endTransaction();
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break;
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case BODY_ID:
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case MESSAGE_ID:
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case SYNCED_MESSAGE_ID:
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case UPDATED_MESSAGE_ID:
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case ATTACHMENT_ID:
|
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case MAILBOX_ID:
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case ACCOUNT_ID:
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case HOSTAUTH_ID:
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id = uri.getPathSegments().get(1);
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if (match == SYNCED_MESSAGE_ID) {
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// For synced messages, first copy the old message to the updated table
|
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// Note the insert or ignore semantics, guaranteeing that only the first
|
||||
// update will be reflected in the updated message table; therefore this row
|
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// will always have the "original" data
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db.execSQL(UPDATED_MESSAGE_INSERT + id);
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} else if (match == MESSAGE_ID) {
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db.execSQL(UPDATED_MESSAGE_DELETE + id);
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}
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result = db.update(TABLE_NAMES[table], values, whereWithId(id, selection),
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selectionArgs);
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break;
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case BODY:
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case MESSAGE:
|
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case UPDATED_MESSAGE:
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case ATTACHMENT:
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case MAILBOX:
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case ACCOUNT:
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case HOSTAUTH:
|
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result = db.update(TABLE_NAMES[table], values, selection, selectionArgs);
|
||||
break;
|
||||
default:
|
||||
throw new IllegalArgumentException("Unknown URI " + uri);
|
||||
}
|
||||
} catch (SQLiteException e) {
|
||||
checkDatabases();
|
||||
throw e;
|
||||
}
|
||||
|
||||
getContext().getContentResolver().notifyChange(uri, null);
|
||||
|
@ -1102,7 +1102,7 @@ public class ProviderTests extends ProviderTestCase2<EmailProvider> {
|
||||
EmailContent.MessageColumns.MAILBOX_KEY + "=?";
|
||||
String[] selArgs = new String[] { String.valueOf(account1Id), String.valueOf(box1Id) };
|
||||
|
||||
// make sure there are two messages
|
||||
// make sure there are six messages
|
||||
int numMessages = EmailContent.count(mMockContext, Message.CONTENT_URI, selection, selArgs);
|
||||
assertEquals(6, numMessages);
|
||||
|
||||
@ -1515,4 +1515,124 @@ public class ProviderTests extends ProviderTestCase2<EmailProvider> {
|
||||
Mailbox restoredBoxA = Mailbox.restoreMailboxWithId(mMockContext, boxA.mId);
|
||||
assertEquals(11, restoredBoxA.mUnreadCount);
|
||||
}
|
||||
|
||||
public void testDatabaseCorruptionRecovery() {
|
||||
final ContentResolver resolver = mMockContext.getContentResolver();
|
||||
final Context context = mMockContext;
|
||||
|
||||
// Create account and two mailboxes
|
||||
Account acct = ProviderTestUtils.setupAccount("acct1", true, context);
|
||||
Mailbox box1 = ProviderTestUtils.setupMailbox("box1", acct.mId, true, context);
|
||||
|
||||
// Create 4 messages in box1 with bodies
|
||||
ProviderTestUtils.setupMessage("message1", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message2", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message3", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message4", acct.mId, box1.mId, true, true, context);
|
||||
|
||||
// Confirm there are four messages
|
||||
int count = EmailContent.count(mMockContext, Message.CONTENT_URI, null, null);
|
||||
assertEquals(4, count);
|
||||
// Confirm there are four bodies
|
||||
count = EmailContent.count(mMockContext, Body.CONTENT_URI, null, null);
|
||||
assertEquals(4, count);
|
||||
|
||||
// Find the EmailProvider.db file
|
||||
File dbFile = mMockContext.getDatabasePath(EmailProvider.DATABASE_NAME);
|
||||
// The EmailProvider.db database should exist (the provider creates it automatically)
|
||||
assertTrue(dbFile != null);
|
||||
assertTrue(dbFile.exists());
|
||||
// Delete it, and confirm it is gone
|
||||
assertTrue(dbFile.delete());
|
||||
assertFalse(dbFile.exists());
|
||||
|
||||
// Find the EmailProviderBody.db file
|
||||
dbFile = mMockContext.getDatabasePath(EmailProvider.BODY_DATABASE_NAME);
|
||||
// The EmailProviderBody.db database should still exist
|
||||
assertTrue(dbFile != null);
|
||||
assertTrue(dbFile.exists());
|
||||
|
||||
// URI to uncache the databases
|
||||
// This simulates the Provider starting up again (otherwise, it will still be pointing to
|
||||
// the already opened files)
|
||||
// Note that we only have access to the EmailProvider via the ContentResolver; therefore,
|
||||
// we cannot directly call into the provider and use a URI for this
|
||||
resolver.update(EmailProvider.INTEGRITY_CHECK_URI, null, null, null);
|
||||
|
||||
// TODO We should check for the deletion of attachment files once this is implemented in
|
||||
// the provider
|
||||
|
||||
// Explanation for what happens below...
|
||||
// The next time the database is created by the provider, it will notice that there's
|
||||
// already a EmailProviderBody.db file. In this case, it will delete that database to
|
||||
// ensure that both are in sync (and empty)
|
||||
|
||||
// Confirm there are no bodies
|
||||
count = EmailContent.count(mMockContext, Body.CONTENT_URI, null, null);
|
||||
assertEquals(0, count);
|
||||
|
||||
// Confirm there are no messages
|
||||
count = EmailContent.count(mMockContext, Message.CONTENT_URI, null, null);
|
||||
assertEquals(0, count);
|
||||
}
|
||||
|
||||
public void testBodyDatabaseCorruptionRecovery() {
|
||||
final ContentResolver resolver = mMockContext.getContentResolver();
|
||||
final Context context = mMockContext;
|
||||
|
||||
// Create account and two mailboxes
|
||||
Account acct = ProviderTestUtils.setupAccount("acct1", true, context);
|
||||
Mailbox box1 = ProviderTestUtils.setupMailbox("box1", acct.mId, true, context);
|
||||
|
||||
// Create 4 messages in box1 with bodies
|
||||
ProviderTestUtils.setupMessage("message1", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message2", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message3", acct.mId, box1.mId, true, true, context);
|
||||
ProviderTestUtils.setupMessage("message4", acct.mId, box1.mId, true, true, context);
|
||||
|
||||
// Confirm there are four messages
|
||||
int count = EmailContent.count(mMockContext, Message.CONTENT_URI, null, null);
|
||||
assertEquals(4, count);
|
||||
// Confirm there are four bodies
|
||||
count = EmailContent.count(mMockContext, Body.CONTENT_URI, null, null);
|
||||
assertEquals(4, count);
|
||||
|
||||
// Find the EmailProviderBody.db file
|
||||
File dbFile = mMockContext.getDatabasePath(EmailProvider.BODY_DATABASE_NAME);
|
||||
// The EmailProviderBody.db database should exist (the provider creates it automatically)
|
||||
assertTrue(dbFile != null);
|
||||
assertTrue(dbFile.exists());
|
||||
// Delete it, and confirm it is gone
|
||||
assertTrue(dbFile.delete());
|
||||
assertFalse(dbFile.exists());
|
||||
|
||||
// Find the EmailProvider.db file
|
||||
dbFile = mMockContext.getDatabasePath(EmailProvider.DATABASE_NAME);
|
||||
// The EmailProviderBody.db database should still exist
|
||||
assertTrue(dbFile != null);
|
||||
assertTrue(dbFile.exists());
|
||||
|
||||
// URI to uncache the databases
|
||||
// This simulates the Provider starting up again (otherwise, it will still be pointing to
|
||||
// the already opened files)
|
||||
// Note that we only have access to the EmailProvider via the ContentResolver; therefore,
|
||||
// we cannot directly call into the provider and use a URI for this
|
||||
resolver.update(EmailProvider.INTEGRITY_CHECK_URI, null, null, null);
|
||||
|
||||
// TODO We should check for the deletion of attachment files once this is implemented in
|
||||
// the provider
|
||||
|
||||
// Explanation for what happens below...
|
||||
// The next time the body database is created by the provider, it will notice that there's
|
||||
// already a populated EmailProvider.db file. In this case, it will delete that database to
|
||||
// ensure that both are in sync (and empty)
|
||||
|
||||
// Confirm there are no messages
|
||||
count = EmailContent.count(mMockContext, Message.CONTENT_URI, null, null);
|
||||
assertEquals(0, count);
|
||||
|
||||
// Confirm there are no bodies
|
||||
count = EmailContent.count(mMockContext, Body.CONTENT_URI, null, null);
|
||||
assertEquals(0, count);
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user