/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.activemq.artemis.core.paging.impl;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.apache.activemq.artemis.api.core.ActiveMQExceptionType;
import org.apache.activemq.artemis.core.paging.PagingStore;
import org.apache.activemq.artemis.core.persistence.OperationContext;
import org.apache.activemq.artemis.core.server.ActiveMQScheduledComponent;
/**
* This will batch multiple calls waiting to perform a sync in a single call.
*/
final class PageSyncTimer extends ActiveMQScheduledComponent {
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
private final PagingStore store;
private final ScheduledExecutorService scheduledExecutor;
private boolean pendingSync;
private final long timeSync;
private final Runnable runnable = new Runnable() {
@Override
public void run() {
tick();
}
};
private final List<OperationContext> syncOperations = new LinkedList<>();
// Static --------------------------------------------------------
// Constructors --------------------------------------------------
PageSyncTimer(PagingStore store, ScheduledExecutorService scheduledExecutor, Executor executor, long timeSync) {
super(scheduledExecutor, executor, timeSync, TimeUnit.NANOSECONDS, true);
this.store = store;
this.scheduledExecutor = scheduledExecutor;
this.timeSync = timeSync;
}
// Public --------------------------------------------------------
synchronized void addSync(OperationContext ctx) {
ctx.pageSyncLineUp();
if (!pendingSync) {
pendingSync = true;
delay();
}
syncOperations.add(ctx);
}
@Override
public void run() {
tick();
}
private void tick() {
OperationContext[] pendingSyncsArray;
synchronized (this) {
pendingSync = false;
pendingSyncsArray = new OperationContext[syncOperations.size()];
pendingSyncsArray = syncOperations.toArray(pendingSyncsArray);
syncOperations.clear();
}
try {
if (pendingSyncsArray.length != 0) {
store.ioSync();
}
} catch (Exception e) {
for (OperationContext ctx : pendingSyncsArray) {
ctx.onError(ActiveMQExceptionType.IO_ERROR.getCode(), e.getMessage());
}
} finally {
// In case of failure, The context should propagate an exception to the client
// We send an exception to the client even on the case of a failure
// to avoid possible locks and the client not getting the exception back
for (OperationContext ctx : pendingSyncsArray) {
ctx.pageSyncDone();
}
}
}
}