org.springframework.boot.devtools.remote.client.DelayedLiveReloadTrigger Maven / Gradle / Ivy
/*
* Copyright 2012-2022 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.remote.client;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.devtools.autoconfigure.OptionalLiveReloadServer;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.util.Assert;
/**
* {@link Runnable} that waits to trigger live reload until the remote server has
* restarted.
*
* @author Phillip Webb
*/
class DelayedLiveReloadTrigger implements Runnable {
private static final long SHUTDOWN_TIME = 1000;
private static final long SLEEP_TIME = 500;
private static final long TIMEOUT = 30000;
private static final Log logger = LogFactory.getLog(DelayedLiveReloadTrigger.class);
private final OptionalLiveReloadServer liveReloadServer;
private final ClientHttpRequestFactory requestFactory;
private final URI uri;
private long shutdownTime = SHUTDOWN_TIME;
private long sleepTime = SLEEP_TIME;
private long timeout = TIMEOUT;
DelayedLiveReloadTrigger(OptionalLiveReloadServer liveReloadServer, ClientHttpRequestFactory requestFactory,
String url) {
Assert.notNull(liveReloadServer, "LiveReloadServer must not be null");
Assert.notNull(requestFactory, "RequestFactory must not be null");
Assert.hasLength(url, "URL must not be empty");
this.liveReloadServer = liveReloadServer;
this.requestFactory = requestFactory;
try {
this.uri = new URI(url);
}
catch (URISyntaxException ex) {
throw new IllegalArgumentException(ex);
}
}
protected void setTimings(long shutdown, long sleep, long timeout) {
this.shutdownTime = shutdown;
this.sleepTime = sleep;
this.timeout = timeout;
}
@Override
public void run() {
try {
Thread.sleep(this.shutdownTime);
long start = System.currentTimeMillis();
while (!isUp()) {
long runTime = System.currentTimeMillis() - start;
if (runTime > this.timeout) {
return;
}
Thread.sleep(this.sleepTime);
}
logger.info("Remote server has changed, triggering LiveReload");
this.liveReloadServer.triggerReload();
}
catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
}
private boolean isUp() {
try {
ClientHttpRequest request = createRequest();
try (ClientHttpResponse response = request.execute()) {
return response.getStatusCode() == HttpStatus.OK;
}
}
catch (Exception ex) {
return false;
}
}
private ClientHttpRequest createRequest() throws IOException {
return this.requestFactory.createRequest(this.uri, HttpMethod.GET);
}
}