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Weather API: Delegate the responsability of rejecting back to back requests [1/2] 

The Weather Manager Service should not impose rules regarding how
a weather provide service wants to react to back to back weather
update requests, nor impose the time a caller should wait before
a new request can be submitted. These constraints vary between
weather services, so it's up the each implementation to enforce
these constraints.

With this patch, the Weather manager service will pass the requests
as they come from the requester and it will be up to the active service
provider decide whether process or reject the request.

Changes to API:
- Moved the request statuses to new inner class RequestStatus in
 CMWeatherManager
- Pass status arg to onLookupCityRequestCompleted()
- Added reject(int) method to ServiceRequest

Change-Id: I3512490688255e25395e955d506fe42ed52f8fe0
TICKET: CYNGNOS-2430
This commit is contained in:
Luis Vidal 2016-04-13 01:08:11 -07:00
parent 377fffca69
commit fe1812fd38
6 changed files with 174 additions and 184 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
api/cm_current.txt
View File

@ -1360,14 +1360,19 @@ package cyanogenmod.weather {
method public int requestWeatherUpdate(android.location.Location, cyanogenmod.weather.CMWeatherManager.WeatherUpdateRequestListener);
method public int requestWeatherUpdate(cyanogenmod.weather.WeatherLocation, cyanogenmod.weather.CMWeatherManager.WeatherUpdateRequestListener);
method public void unregisterWeatherServiceProviderChangeListener(cyanogenmod.weather.CMWeatherManager.WeatherServiceProviderChangeListener);
field public static final int WEATHER_REQUEST_ALREADY_IN_PROGRESS = -3; // 0xfffffffd
field public static final int WEATHER_REQUEST_COMPLETED = 1; // 0x1
field public static final int WEATHER_REQUEST_FAILED = -2; // 0xfffffffe
field public static final int WEATHER_REQUEST_SUBMITTED_TOO_SOON = -1; // 0xffffffff
}
public static abstract interface CMWeatherManager.LookupCityRequestListener {
method public abstract void onLookupCityRequestCompleted(java.util.List<cyanogenmod.weather.WeatherLocation>);
method public abstract void onLookupCityRequestCompleted(int, java.util.List<cyanogenmod.weather.WeatherLocation>);
}
public static class CMWeatherManager.RequestStatus {
ctor public CMWeatherManager.RequestStatus();
field public static final int ALREADY_IN_PROGRESS = -3; // 0xfffffffd
field public static final int COMPLETED = 1; // 0x1
field public static final int FAILED = -1; // 0xffffffff
field public static final int NO_MATCH_FOUND = -4; // 0xfffffffc
field public static final int SUBMITTED_TOO_SOON = -2; // 0xfffffffe
}
public static abstract interface CMWeatherManager.WeatherServiceProviderChangeListener {
@ -1468,6 +1473,7 @@ package cyanogenmod.weatherservice {
method public void complete(cyanogenmod.weatherservice.ServiceRequestResult);
method public void fail();
method public cyanogenmod.weather.RequestInfo getRequestInfo();
method public void reject(int);
}
public final class ServiceRequestResult implements android.os.Parcelable {

114
cm/lib/main/java/org/cyanogenmod/platform/internal/CMWeatherManagerService.java
View File

@ -31,7 +31,6 @@ import android.os.Binder;
import android.os.IBinder;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.Slog;
@ -58,16 +57,9 @@ import java.util.List;
public class CMWeatherManagerService extends SystemService{
private static final String TAG = CMWeatherManagerService.class.getSimpleName();
/**
* How long clients will have to wait until a new weather update request can be honored
* TODO Allow weather service providers to specify this threshold
*/
private static final long REQUEST_THRESHOLD_MILLIS = 1000L * 60L * 10L;
private IWeatherProviderService mWeatherProviderService;
private boolean mIsWeatherProviderServiceBound;
private long mLastWeatherUpdateRequestTimestamp = -REQUEST_THRESHOLD_MILLIS;
private boolean mIsProcessingRequest = false;
private Object mMutex = new Object();
private Context mContext;
private final RemoteCallbackList<IWeatherServiceProviderChangeListener> mProviderChangeListeners
@ -78,12 +70,16 @@ public class CMWeatherManagerService extends SystemService{
= new IWeatherProviderServiceClient.Stub() {
@Override
public void setServiceRequestState(RequestInfo requestInfo,
ServiceRequestResult result, int state) {
ServiceRequestResult result, int status) {
synchronized (mMutex) {
if (requestInfo == null) {
//Invalid request info object
mIsProcessingRequest = false;
return;
}
if (!isValidRequestInfoStatus(status)) {
//Invalid request status
return;
}
@ -93,19 +89,14 @@ public class CMWeatherManagerService extends SystemService{
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
if (!isValidRequestInfoState(requestType, state)) {
//We received an invalid state, silently disregard the request
mIsProcessingRequest = false;
return;
}
WeatherInfo weatherInfo = null;
if (state == CMWeatherManager.WEATHER_REQUEST_COMPLETED) {
if (status == CMWeatherManager.RequestStatus.COMPLETED) {
weatherInfo = (result != null) ? result.getWeatherInfo() : null;
if (weatherInfo == null) {
//This should never happen! WEATHER_REQUEST_COMPLETED is set
//only if the weatherinfo object was not null when the request
//was marked as completed
state = CMWeatherManager.WEATHER_REQUEST_FAILED;
status = CMWeatherManager.RequestStatus.FAILED;
} else {
if (!requestInfo.isQueryOnlyWeatherRequest()) {
final long identity = Binder.clearCallingIdentity();
@ -119,7 +110,8 @@ public class CMWeatherManagerService extends SystemService{
}
if (isValidListener(listener)) {
try {
listener.onWeatherRequestCompleted(requestInfo, state, weatherInfo);
listener.onWeatherRequestCompleted(requestInfo, status,
weatherInfo);
} catch (RemoteException e) {
}
}
@ -128,40 +120,25 @@ public class CMWeatherManagerService extends SystemService{
if (isValidListener(listener)) {
try {
//Result might be null if the provider marked the request as failed
listener.onLookupCityRequestCompleted(requestInfo,
listener.onLookupCityRequestCompleted(requestInfo, status,
result != null ? result.getLocationLookupList() : null);
} catch (RemoteException e) {
}
}
break;
}
mIsProcessingRequest = false;
}
}
};
private boolean isValidRequestInfoState(int requestType, int state) {
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
switch (state) {
case CMWeatherManager.WEATHER_REQUEST_COMPLETED:
case CMWeatherManager.WEATHER_REQUEST_SUBMITTED_TOO_SOON:
case CMWeatherManager.WEATHER_REQUEST_FAILED:
case CMWeatherManager.WEATHER_REQUEST_ALREADY_IN_PROGRESS:
return true;
default:
return false;
}
case RequestInfo.TYPE_LOOKUP_CITY_NAME_REQ:
switch (state) {
case CMWeatherManager.LOOKUP_REQUEST_COMPLETED:
case CMWeatherManager.LOOKUP_REQUEST_FAILED:
case CMWeatherManager.LOOKUP_REQUEST_NO_MATCH_FOUND:
return true;
default:
return false;
}
private boolean isValidRequestInfoStatus(int state) {
switch (state) {
case CMWeatherManager.RequestStatus.COMPLETED:
case CMWeatherManager.RequestStatus.ALREADY_IN_PROGRESS:
case CMWeatherManager.RequestStatus.FAILED:
case CMWeatherManager.RequestStatus.NO_MATCH_FOUND:
case CMWeatherManager.RequestStatus.SUBMITTED_TOO_SOON:
return true;
default:
return false;
}
@ -271,36 +248,14 @@ public class CMWeatherManagerService extends SystemService{
}
}
private boolean canProcessWeatherUpdateRequest(RequestInfo info, long currentTimeMillis) {
private boolean canProcessWeatherUpdateRequest(RequestInfo info) {
final IRequestInfoListener listener = info.getRequestListener();
if ((mLastWeatherUpdateRequestTimestamp + REQUEST_THRESHOLD_MILLIS) > currentTimeMillis) {
if (listener != null && listener.asBinder().pingBinder()) {
try {
listener.onWeatherRequestCompleted(info,
CMWeatherManager.WEATHER_REQUEST_SUBMITTED_TOO_SOON, null);
} catch (RemoteException e) {
}
}
return false;
}
if (mIsProcessingRequest) {
if (listener != null && listener.asBinder().pingBinder()) {
try {
listener.onWeatherRequestCompleted(info,
CMWeatherManager.WEATHER_REQUEST_ALREADY_IN_PROGRESS, null);
} catch (RemoteException e) {
}
}
return false;
}
if (!mIsWeatherProviderServiceBound) {
if (listener != null && listener.asBinder().pingBinder()) {
try {
listener.onWeatherRequestCompleted(info,
CMWeatherManager.WEATHER_REQUEST_FAILED, null);
CMWeatherManager.RequestStatus.FAILED, null);
} catch (RemoteException e) {
}
}
@ -310,12 +265,7 @@ public class CMWeatherManagerService extends SystemService{
}
private synchronized void processWeatherUpdateRequest(RequestInfo info) {
final long currentTimeMillis = SystemClock.elapsedRealtime();
if (!canProcessWeatherUpdateRequest(info, currentTimeMillis)) return;
mLastWeatherUpdateRequestTimestamp = currentTimeMillis;
mIsProcessingRequest = true;
if (!canProcessWeatherUpdateRequest(info)) return;
try {
mWeatherProviderService.processWeatherUpdateRequest(info);
} catch (RemoteException e) {
@ -327,13 +277,13 @@ public class CMWeatherManagerService extends SystemService{
final IRequestInfoListener listener = info.getRequestListener();
if (listener != null && listener.asBinder().pingBinder()) {
try {
listener.onLookupCityRequestCompleted(info, null);
listener.onLookupCityRequestCompleted(info,
CMWeatherManager.RequestStatus.FAILED, null);
} catch (RemoteException e) {
}
}
return;
}
try {
mWeatherProviderService.processCityNameLookupRequest(info);
} catch(RemoteException e){
@ -368,9 +318,6 @@ public class CMWeatherManagerService extends SystemService{
public void onServiceDisconnected(ComponentName name) {
mWeatherProviderService = null;
mIsWeatherProviderServiceBound = false;
//We can't talk to the current service anyway...
mIsProcessingRequest = false;
mLastWeatherUpdateRequestTimestamp = -REQUEST_THRESHOLD_MILLIS;
Slog.d(TAG, "Connection with " + name.flattenToString() + " has been closed");
}
};
@ -543,16 +490,17 @@ public class CMWeatherManagerService extends SystemService{
private synchronized void disconnectClient() {
if (mIsWeatherProviderServiceBound) {
if (mIsProcessingRequest) {
try {
mWeatherProviderService.cancelOngoingRequests();
} catch (RemoteException e) {
}
mIsProcessingRequest = false;
//let's cancel any pending request
try {
mWeatherProviderService.cancelOngoingRequests();
} catch (RemoteException e) {
Slog.d(TAG, "Error occurred while trying to cancel ongoing requests");
}
//Disconnect from client
try {
mWeatherProviderService.setServiceClient(null);
} catch (RemoteException e) {
Slog.d(TAG, "Error occurred while disconnecting client");
}
getContext().unbindService(mWeatherServiceProviderConnection);

81
sdk/src/java/cyanogenmod/weather/CMWeatherManager.java
View File

@ -53,40 +53,32 @@ public class CMWeatherManager {
private static final String TAG = CMWeatherManager.class.getSimpleName();
/**
* Weather update request state: Successfully completed
*/
public static final int WEATHER_REQUEST_COMPLETED = 1;
/**
* Weather update request state: You need to wait a bit longer before requesting an update
* again.
* <p>Please bear in mind that the weather does not change very often. A threshold of 10 minutes
* is enforced by the system</p>
* The different request statuses
*/
public static final int WEATHER_REQUEST_SUBMITTED_TOO_SOON = -1;
/**
* Weather update request state: An error occurred while trying to update the weather. You
* should wait before trying again, or your request will be rejected with
* {@link #WEATHER_REQUEST_SUBMITTED_TOO_SOON}
*/
public static final int WEATHER_REQUEST_FAILED = -2;
/**
* Weather update request state: Only one update request can be processed at a given time.
*/
public static final int WEATHER_REQUEST_ALREADY_IN_PROGRESS = -3;
/** @hide */
public static final int LOOKUP_REQUEST_COMPLETED = 100;
/** @hide */
public static final int LOOKUP_REQUEST_FAILED = -100;
/** @hide */
public static final int LOOKUP_REQUEST_NO_MATCH_FOUND = -101;
public static class RequestStatus {
/**
* Request Successfully completed
*/
public static final int COMPLETED = 1;
/**
* An error occurred while trying to honor the request.
*/
public static final int FAILED = -1;
/**
* The request can't be processed at this time
*/
public static final int SUBMITTED_TOO_SOON = -2;
/**
* Another request in already in progress
*/
public static final int ALREADY_IN_PROGRESS = -3;
/**
* No match found for the query
*/
public static final int NO_MATCH_FOUND = -4;
}
private CMWeatherManager(Context context) {
Context appContext = context.getApplicationContext();
@ -330,7 +322,7 @@ public class CMWeatherManager {
private final IRequestInfoListener mRequestInfoListener = new IRequestInfoListener.Stub() {
@Override
public void onWeatherRequestCompleted(final RequestInfo requestInfo, final int state,
public void onWeatherRequestCompleted(final RequestInfo requestInfo, final int status,
final WeatherInfo weatherInfo) {
final WeatherUpdateRequestListener listener
= mWeatherUpdateRequestListeners.remove(requestInfo);
@ -338,14 +330,14 @@ public class CMWeatherManager {
mHandler.post(new Runnable() {
@Override
public void run() {
listener.onWeatherRequestCompleted(state, weatherInfo);
listener.onWeatherRequestCompleted(status, weatherInfo);
}
});
}
}
@Override
public void onLookupCityRequestCompleted(RequestInfo requestInfo,
public void onLookupCityRequestCompleted(RequestInfo requestInfo, final int status,
final List<WeatherLocation> weatherLocations) {
final LookupCityRequestListener listener
@ -354,7 +346,7 @@ public class CMWeatherManager {
mHandler.post(new Runnable() {
@Override
public void run() {
listener.onLookupCityRequestCompleted(weatherLocations);
listener.onLookupCityRequestCompleted(status, weatherLocations);
}
});
}
@ -369,16 +361,12 @@ public class CMWeatherManager {
* This method will be called when the weather service provider has finished processing the
* request
*
* @param state Any of the following values
* {@link #WEATHER_REQUEST_COMPLETED}
* {@link #WEATHER_REQUEST_ALREADY_IN_PROGRESS}
* {@link #WEATHER_REQUEST_SUBMITTED_TOO_SOON}
* {@link #WEATHER_REQUEST_FAILED}
* @param status See {@link RequestStatus}
*
* @param weatherInfo A fully populated {@link WeatherInfo} if state is
* {@link #WEATHER_REQUEST_COMPLETED}, null otherwise
* {@link RequestStatus#COMPLETED}, null otherwise
*/
void onWeatherRequestCompleted(int state, WeatherInfo weatherInfo);
void onWeatherRequestCompleted(int status, WeatherInfo weatherInfo);
}
/**
@ -387,11 +375,14 @@ public class CMWeatherManager {
public interface LookupCityRequestListener {
/**
* This method will be called when the weather service provider has finished processing the
* request. The argument can be null if the provider couldn't find a match
* request.
*
* @param locations
* @param status See {@link RequestStatus}
*
* @param locations A list of {@link WeatherLocation} if the status is
* {@link RequestStatus#COMPLETED}, null otherwise
*/
void onLookupCityRequestCompleted(List<WeatherLocation> locations);
void onLookupCityRequestCompleted(int status, List<WeatherLocation> locations);
}
/**

4
sdk/src/java/cyanogenmod/weather/IRequestInfoListener.aidl
View File

@ -24,8 +24,8 @@ import java.util.List;
/** @hide */
oneway interface IRequestInfoListener {
void onWeatherRequestCompleted(in RequestInfo requestInfo, int state,
void onWeatherRequestCompleted(in RequestInfo requestInfo, int status,
in WeatherInfo weatherInfo);
void onLookupCityRequestCompleted(in RequestInfo requestInfo,
void onLookupCityRequestCompleted(in RequestInfo requestInfo, int status,
in List<WeatherLocation> weatherLocation);
}

127
sdk/src/java/cyanogenmod/weatherservice/ServiceRequest.java
View File

@ -29,15 +29,15 @@ public final class ServiceRequest {
private final RequestInfo mInfo;
private final IWeatherProviderServiceClient mClient;
/**
* If a request is marked as cancelled, it means the client does not want to know anything about
* this request anymore
*/
private volatile boolean mCancelled;
private enum Status {
IN_PROGRESS, COMPLETED, CANCELLED, FAILED, REJECTED
}
private Status mStatus;
/* package */ ServiceRequest(RequestInfo info, IWeatherProviderServiceClient client) {
mInfo = info;
mClient = client;
mStatus = Status.IN_PROGRESS;
}
/**
@ -52,32 +52,36 @@ public final class ServiceRequest {
* This method should be called once the request has been completed
*/
public void complete(@NonNull ServiceRequestResult result) {
if (!mCancelled) {
try {
final int requestType = mInfo.getRequestType();
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
if (result.getWeatherInfo() == null) {
throw new IllegalStateException("The service request result does not"
+ " contain a valid WeatherInfo object");
}
mClient.setServiceRequestState(mInfo, result,
CMWeatherManager.WEATHER_REQUEST_COMPLETED);
break;
case RequestInfo.TYPE_LOOKUP_CITY_NAME_REQ:
if (result.getLocationLookupList() == null) {
//In case the user decided to mark this request as completed with an
//empty list. It's not necessarily a failure
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.LOOKUP_REQUEST_NO_MATCH_FOUND);
} else {
synchronized (this) {
if (mStatus.equals(Status.IN_PROGRESS)) {
try {
final int requestType = mInfo.getRequestType();
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
if (result.getWeatherInfo() == null) {
throw new IllegalStateException("The service request result doesn't"
+ " contain a valid WeatherInfo object");
}
mClient.setServiceRequestState(mInfo, result,
CMWeatherManager.LOOKUP_REQUEST_COMPLETED);
}
break;
CMWeatherManager.RequestStatus.COMPLETED);
break;
case RequestInfo.TYPE_LOOKUP_CITY_NAME_REQ:
if (result.getLocationLookupList() == null
|| result.getLocationLookupList().size() <= 0) {
//In case the user decided to mark this request as completed with
//null or empty list. It's not necessarily a failure
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.RequestStatus.NO_MATCH_FOUND);
} else {
mClient.setServiceRequestState(mInfo, result,
CMWeatherManager.RequestStatus.COMPLETED);
}
break;
}
} catch (RemoteException e) {
}
} catch (RemoteException e) {
mStatus = Status.COMPLETED;
}
}
}
@ -87,21 +91,54 @@ public final class ServiceRequest {
* (no internet connection, time out, etc.)
*/
public void fail() {
if (!mCancelled) {
try {
final int requestType = mInfo.getRequestType();
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.WEATHER_REQUEST_FAILED);
break;
case RequestInfo.TYPE_LOOKUP_CITY_NAME_REQ:
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.LOOKUP_REQUEST_FAILED);
break;
synchronized (this) {
if (mStatus.equals(Status.IN_PROGRESS)) {
try {
final int requestType = mInfo.getRequestType();
switch (requestType) {
case RequestInfo.TYPE_WEATHER_BY_GEO_LOCATION_REQ:
case RequestInfo.TYPE_WEATHER_BY_WEATHER_LOCATION_REQ:
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.RequestStatus.FAILED);
break;
case RequestInfo.TYPE_LOOKUP_CITY_NAME_REQ:
mClient.setServiceRequestState(mInfo, null,
CMWeatherManager.RequestStatus.FAILED);
break;
}
} catch (RemoteException e) {
}
} catch (RemoteException e) {
mStatus = Status.FAILED;
}
}
}
/**
* This method should be called if the service decides not to honor the request. Note this
* method will accept only the following values.
* <ul>
* <li>{@link cyanogenmod.weather.CMWeatherManager.RequestStatus#SUBMITTED_TOO_SOON}</li>
* <li>{@link cyanogenmod.weather.CMWeatherManager.RequestStatus#ALREADY_IN_PROGRESS}</li>
* </ul>
* Attempting to pass any other value will get you an IllegalArgumentException
* @param status
*/
public void reject(int status) {
synchronized (this) {
if (mStatus.equals(Status.IN_PROGRESS)) {
switch (status) {
case CMWeatherManager.RequestStatus.ALREADY_IN_PROGRESS:
case CMWeatherManager.RequestStatus.SUBMITTED_TOO_SOON:
try {
mClient.setServiceRequestState(mInfo, null, status);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
default:
throw new IllegalArgumentException("Can't reject with status " + status);
}
mStatus = Status.REJECTED;
}
}
}
@ -113,6 +150,8 @@ public final class ServiceRequest {
* @hide
*/
public void cancel() {
mCancelled = true;
synchronized (this) {
mStatus = Status.CANCELLED;
}
}
}

16
system-api/cm_system-current.txt
View File

@ -1360,14 +1360,19 @@ package cyanogenmod.weather {
method public int requestWeatherUpdate(android.location.Location, cyanogenmod.weather.CMWeatherManager.WeatherUpdateRequestListener);
method public int requestWeatherUpdate(cyanogenmod.weather.WeatherLocation, cyanogenmod.weather.CMWeatherManager.WeatherUpdateRequestListener);
method public void unregisterWeatherServiceProviderChangeListener(cyanogenmod.weather.CMWeatherManager.WeatherServiceProviderChangeListener);
field public static final int WEATHER_REQUEST_ALREADY_IN_PROGRESS = -3; // 0xfffffffd
field public static final int WEATHER_REQUEST_COMPLETED = 1; // 0x1
field public static final int WEATHER_REQUEST_FAILED = -2; // 0xfffffffe
field public static final int WEATHER_REQUEST_SUBMITTED_TOO_SOON = -1; // 0xffffffff
}
public static abstract interface CMWeatherManager.LookupCityRequestListener {
method public abstract void onLookupCityRequestCompleted(java.util.List<cyanogenmod.weather.WeatherLocation>);
method public abstract void onLookupCityRequestCompleted(int, java.util.List<cyanogenmod.weather.WeatherLocation>);
}
public static class CMWeatherManager.RequestStatus {
ctor public CMWeatherManager.RequestStatus();
field public static final int ALREADY_IN_PROGRESS = -3; // 0xfffffffd
field public static final int COMPLETED = 1; // 0x1
field public static final int FAILED = -1; // 0xffffffff
field public static final int NO_MATCH_FOUND = -4; // 0xfffffffc
field public static final int SUBMITTED_TOO_SOON = -2; // 0xfffffffe
}
public static abstract interface CMWeatherManager.WeatherServiceProviderChangeListener {
@ -1468,6 +1473,7 @@ package cyanogenmod.weatherservice {
method public void complete(cyanogenmod.weatherservice.ServiceRequestResult);
method public void fail();
method public cyanogenmod.weather.RequestInfo getRequestInfo();
method public void reject(int);
}
public final class ServiceRequestResult implements android.os.Parcelable {