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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content;
import android.os.*;
import android.os.Process;
import android.accounts.Account;
import java.util.concurrent.atomic.AtomicInteger;
/**
* @hide
*/
public abstract class SyncAdapterNew {
private static final String TAG = "SyncAdapter";
private final Context mContext;
private final String mAuthority;
/** Kernel event log tag. Also listed in data/etc/event-log-tags. */
public static final int LOG_SYNC_DETAILS = 2743;
public SyncAdapterNew(Context context, String authority) {
mContext = context;
mAuthority = authority;
}
class Transport extends ISyncAdapter.Stub {
private final AtomicInteger mNumSyncStarts = new AtomicInteger(0);
private volatile Thread mSyncThread;
public void startSync(ISyncContext syncContext, Account account, Bundle extras) {
boolean alreadyInProgress;
synchronized (this) {
if (mSyncThread == null) {
mSyncThread = new Thread(
new SyncRunnable(new SyncContext(syncContext), account, extras),
"SyncAdapterThread-" + mNumSyncStarts.incrementAndGet());
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
mSyncThread.start();
alreadyInProgress = false;
} else {
alreadyInProgress = true;
}
}
if (alreadyInProgress) {
try {
syncContext.onFinished(SyncResult.ALREADY_IN_PROGRESS);
} catch (RemoteException e) {
// don't care if the caller is no longer around
}
}
}
public void cancelSync() {
synchronized (this) {
if (mSyncThread != null) {
mSyncThread.interrupt();
}
}
}
private class SyncRunnable implements Runnable {
private final SyncContext mSyncContext;
private final Account mAccount;
private final Bundle mExtras;
private SyncRunnable(SyncContext syncContext, Account account, Bundle extras) {
mSyncContext = syncContext;
mAccount = account;
mExtras = extras;
}
public void run() {
if (isCanceled()) {
return;
}
SyncResult syncResult = new SyncResult();
ContentProviderClient provider = mAuthority != null
? mContext.getContentResolver().acquireContentProviderClient(mAuthority)
: null;
try {
SyncAdapterNew.this.performSync(mAccount, mExtras, provider, syncResult);
} finally {
if (provider != null) {
provider.release();
}
if (!isCanceled()) {
mSyncContext.onFinished(syncResult);
}
mSyncThread = null;
}
}
private boolean isCanceled() {
return Thread.currentThread().isInterrupted();
}
}
}
Transport mTransport = new Transport();
/**
* Get the Transport object.
*/
public final ISyncAdapter getISyncAdapter() {
return mTransport;
}
/**
* Perform a sync for this account. SyncAdapter-specific parameters may
* be specified in extras, which is guaranteed to not be null. Invocations
* of this method are guaranteed to be serialized.
*
* @param account the account that should be synced
* @param extras SyncAdapter-specific parameters
*/
public abstract void performSync(Account account, Bundle extras,
ContentProviderClient provider, SyncResult syncResult);
}
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