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/*******************************************************************************
* Copyright (c) 2009, 2010 VMware Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* VMware Inc. - initial contribution
*******************************************************************************/
package org.eclipse.gemini.web.internal;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.eclipse.gemini.web.core.WebApplication;
import org.eclipse.gemini.web.core.WebApplicationStartFailedException;
final class WebApplicationStartFailureRetryController {
private final Object monitor = new Object();
private final ConcurrentMap<String, Set<StandardWebApplication>> failures = new ConcurrentHashMap<String, Set<StandardWebApplication>>();
void recordFailure(StandardWebApplication failedWebApplication) {
String contextPath = failedWebApplication.getContextPath();
if (contextPath != null) {
addFailureForWebContextPath(contextPath, failedWebApplication);
}
}
private void addFailureForWebContextPath(String contextPath, StandardWebApplication failedWebApplication) {
Set<StandardWebApplication> contextFailures = this.failures.get(contextPath);
if (contextFailures == null) {
contextFailures = new HashSet<StandardWebApplication>();
Set<StandardWebApplication> previousContextFailures = this.failures.putIfAbsent(contextPath, contextFailures);
if (previousContextFailures != null) {
contextFailures = previousContextFailures;
}
}
synchronized (this.monitor) {
contextFailures.add(failedWebApplication);
}
}
void retryFailures(StandardWebApplication stoppedWebApplication) {
String contextPath = stoppedWebApplication.getContextPath();
if (contextPath != null) {
Set<StandardWebApplication> contextFailures = removeFailuresForWebContextPath(contextPath);
contextFailures.remove(stoppedWebApplication);
for (WebApplication failedWebApplication : contextFailures) {
try {
failedWebApplication.start();
} catch (WebApplicationStartFailedException _) {
// ignore as the web application will have been added to the new contextFailures set
}
}
}
}
private Set<StandardWebApplication> removeFailuresForWebContextPath(String contextPath) {
Set<StandardWebApplication> sortedContextFailures = createSetSortedByBundleId();
Set<StandardWebApplication> contextFailures = this.failures.remove(contextPath);
if (contextFailures != null) {
sortedContextFailures.addAll(contextFailures);
}
return sortedContextFailures;
}
private Set<StandardWebApplication> createSetSortedByBundleId() {
return new TreeSet<StandardWebApplication>(new Comparator<StandardWebApplication>() {
public int compare(StandardWebApplication wa1, StandardWebApplication wa2) {
long id1 = wa1.getBundle().getBundleId();
long id2 = wa2.getBundle().getBundleId();
if (id1 < id2) {
return -1;
} else if (id1 > id2) {
return 1;
} else {
return 0;
}
}
});
}
void clear() {
this.failures.clear();
}
}
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