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/*
* Copyright (C) 2022 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.server.telecom.voip;
import static android.telecom.CallException.CODE_OPERATION_TIMED_OUT;
import android.os.OutcomeReceiver;
import android.telecom.TelecomManager;
import android.telecom.CallException;
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.List;
import java.util.Queue;
public class TransactionManager {
private static final String TAG = "VoipCallTransactionManager";
private static TransactionManager INSTANCE = null;
private static final Object sLock = new Object();
private Queue<VoipCallTransaction> mTransactions;
private VoipCallTransaction mCurrentTransaction;
public interface TransactionCompleteListener {
void onTransactionCompleted(VoipCallTransactionResult result, String transactionName);
void onTransactionTimeout(String transactionName);
}
private TransactionManager() {
mTransactions = new ArrayDeque<>();
mCurrentTransaction = null;
}
public static TransactionManager getInstance() {
synchronized (sLock) {
if (INSTANCE == null) {
INSTANCE = new TransactionManager();
}
}
return INSTANCE;
}
@VisibleForTesting
public static TransactionManager getTestInstance() {
return new TransactionManager();
}
public void addTransaction(VoipCallTransaction transaction,
OutcomeReceiver<VoipCallTransactionResult, CallException> receiver) {
synchronized (sLock) {
mTransactions.add(transaction);
}
transaction.setCompleteListener(new TransactionCompleteListener() {
@Override
public void onTransactionCompleted(VoipCallTransactionResult result,
String transactionName){
Log.i(TAG, String.format("transaction %s completed: with result=[%d]",
transactionName, result.getResult()));
if (result.getResult() == TelecomManager.TELECOM_TRANSACTION_SUCCESS) {
receiver.onResult(result);
} else {
receiver.onError(
new CallException(result.getMessage(),
result.getResult()));
}
finishTransaction();
}
@Override
public void onTransactionTimeout(String transactionName){
Log.i(TAG, String.format("transaction %s timeout", transactionName));
receiver.onError(new CallException(transactionName + " timeout",
CODE_OPERATION_TIMED_OUT));
finishTransaction();
}
});
startTransactions();
}
private void startTransactions() {
synchronized (sLock) {
if (mTransactions.isEmpty()) {
// No transaction waiting for process
return;
}
if (mCurrentTransaction != null) {
// Ongoing transaction
return;
}
mCurrentTransaction = mTransactions.poll();
}
mCurrentTransaction.start();
}
private void finishTransaction() {
synchronized (sLock) {
mCurrentTransaction = null;
}
startTransactions();
}
@VisibleForTesting
public void clear() {
List<VoipCallTransaction> pendingTransactions;
synchronized (sLock) {
pendingTransactions = new ArrayList<>(mTransactions);
}
for (VoipCallTransaction transaction : pendingTransactions) {
transaction.finish();
}
}
}
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