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/*
* Copyright (C) 2016 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 com.android.voicemail.impl.scheduling;
import android.content.Intent;
import android.telecom.PhoneAccountHandle;
import com.android.voicemail.impl.VoicemailStatus;
import com.android.voicemail.impl.VvmLog;
/**
* A task with this policy will automatically re-queue itself if {@link BaseTask#fail()} has been
* called during {@link BaseTask#onExecuteInBackgroundThread()}. A task will be retried at most
* <code>retryLimit</code> times and with a <code>retryDelayMillis</code> interval in between.
*/
public class RetryPolicy implements Policy {
private static final String TAG = "RetryPolicy";
private static final String EXTRA_RETRY_COUNT = "extra_retry_count";
private final int mRetryLimit;
private final int mRetryDelayMillis;
private BaseTask mTask;
private int mRetryCount;
private boolean mFailed;
private VoicemailStatus.DeferredEditor mVoicemailStatusEditor;
public RetryPolicy(int retryLimit, int retryDelayMillis) {
mRetryLimit = retryLimit;
mRetryDelayMillis = retryDelayMillis;
}
private boolean hasMoreRetries() {
return mRetryCount < mRetryLimit;
}
/**
* Error status should only be set if retries has exhausted or the task is successful. Status
* writes to this editor will be deferred until the task has ended, and will only be committed if
* the task is successful or there are no retries left.
*/
public VoicemailStatus.Editor getVoicemailStatusEditor() {
return mVoicemailStatusEditor;
}
@Override
public void onCreate(BaseTask task, Intent intent, int flags, int startId) {
mTask = task;
mRetryCount = intent.getIntExtra(EXTRA_RETRY_COUNT, 0);
if (mRetryCount > 0) {
VvmLog.d(
TAG,
"retry #" + mRetryCount + " for " + mTask + " queued, executing in " + mRetryDelayMillis);
mTask.setExecutionTime(mTask.getTimeMillis() + mRetryDelayMillis);
}
PhoneAccountHandle phoneAccountHandle = task.getPhoneAccountHandle();
if (phoneAccountHandle == null) {
VvmLog.e(TAG, "null phone account for phoneAccountHandle " + task.getPhoneAccountHandle());
// This should never happen, but continue on if it does. The status write will be
// discarded.
}
mVoicemailStatusEditor = VoicemailStatus.deferredEdit(task.getContext(), phoneAccountHandle);
}
@Override
public void onBeforeExecute() {}
@Override
public void onCompleted() {
if (!mFailed || !hasMoreRetries()) {
if (!mFailed) {
VvmLog.d(TAG, mTask.toString() + " completed successfully");
}
if (!hasMoreRetries()) {
VvmLog.d(TAG, "Retry limit for " + mTask + " reached");
}
VvmLog.i(TAG, "committing deferred status: " + mVoicemailStatusEditor.getValues());
mVoicemailStatusEditor.deferredApply();
return;
}
VvmLog.i(TAG, "discarding deferred status: " + mVoicemailStatusEditor.getValues());
Intent intent = mTask.createRestartIntent();
intent.putExtra(EXTRA_RETRY_COUNT, mRetryCount + 1);
mTask.getContext().startService(intent);
}
@Override
public void onFail() {
mFailed = true;
}
@Override
public void onDuplicatedTaskAdded() {}
}
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