org.springframework.boot.devtools.autoconfigure.FileWatchingFailureHandler Maven / Gradle / Ivy
/*
* Copyright 2012-2020 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
*
* https://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.autoconfigure;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import org.springframework.boot.devtools.classpath.ClassPathDirectories;
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.filewatch.FileSystemWatcherFactory;
import org.springframework.boot.devtools.restart.FailureHandler;
import org.springframework.boot.devtools.restart.Restarter;
/**
* {@link FailureHandler} that waits for filesystem changes before retrying.
*
* @author Phillip Webb
*/
class FileWatchingFailureHandler implements FailureHandler {
private final FileSystemWatcherFactory fileSystemWatcherFactory;
FileWatchingFailureHandler(FileSystemWatcherFactory fileSystemWatcherFactory) {
this.fileSystemWatcherFactory = fileSystemWatcherFactory;
}
@Override
public Outcome handle(Throwable failure) {
CountDownLatch latch = new CountDownLatch(1);
FileSystemWatcher watcher = this.fileSystemWatcherFactory.getFileSystemWatcher();
watcher.addSourceDirectories(new ClassPathDirectories(Restarter.getInstance().getInitialUrls()));
watcher.addListener(new Listener(latch));
watcher.start();
try {
latch.await();
}
catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
return Outcome.RETRY;
}
private static class Listener implements FileChangeListener {
private final CountDownLatch latch;
Listener(CountDownLatch latch) {
this.latch = latch;
}
@Override
public void onChange(Set changeSet) {
this.latch.countDown();
}
}
}