org.springframework.boot.devtools.classpath.ClassPathFileChangeListener Maven / Gradle / Ivy
/*
* Copyright 2012-2015 the original author or authors.
*
* 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 org.springframework.boot.devtools.classpath;
import java.util.Set;
import org.springframework.boot.devtools.filewatch.ChangedFile;
import org.springframework.boot.devtools.filewatch.ChangedFiles;
import org.springframework.boot.devtools.filewatch.FileChangeListener;
import org.springframework.boot.devtools.filewatch.FileSystemWatcher;
import org.springframework.boot.devtools.restart.AgentReloader;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.util.Assert;
/**
* A {@link FileChangeListener} to publish {@link ClassPathChangedEvent
* ClassPathChangedEvents}.
*
* @author Phillip Webb
* @see ClassPathFileSystemWatcher
*/
class ClassPathFileChangeListener implements FileChangeListener {
private final ApplicationEventPublisher eventPublisher;
private final ClassPathRestartStrategy restartStrategy;
private final FileSystemWatcher fileSystemWatcherToStop;
/**
* Create a new {@link ClassPathFileChangeListener} instance.
* @param eventPublisher the event publisher used send events
* @param restartStrategy the restart strategy to use
* @param fileSystemWatcherToStop the file system watcher to stop on a restart (or
* {@code null})
*/
ClassPathFileChangeListener(ApplicationEventPublisher eventPublisher,
ClassPathRestartStrategy restartStrategy,
FileSystemWatcher fileSystemWatcherToStop) {
Assert.notNull(eventPublisher, "EventPublisher must not be null");
Assert.notNull(restartStrategy, "RestartStrategy must not be null");
this.eventPublisher = eventPublisher;
this.restartStrategy = restartStrategy;
this.fileSystemWatcherToStop = fileSystemWatcherToStop;
}
@Override
public void onChange(Set changeSet) {
boolean restart = isRestartRequired(changeSet);
publishEvent(new ClassPathChangedEvent(this, changeSet, restart));
}
private void publishEvent(ClassPathChangedEvent event) {
this.eventPublisher.publishEvent(event);
if (event.isRestartRequired() && this.fileSystemWatcherToStop != null) {
this.fileSystemWatcherToStop.stop();
}
}
private boolean isRestartRequired(Set changeSet) {
if (AgentReloader.isActive()) {
return false;
}
for (ChangedFiles changedFiles : changeSet) {
for (ChangedFile changedFile : changedFiles) {
if (this.restartStrategy.isRestartRequired(changedFile)) {
return true;
}
}
}
return false;
}
}