/*
* 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.brooklyn.rest.util;
import org.apache.brooklyn.api.mgmt.ManagementContext;
import org.apache.brooklyn.core.mgmt.internal.ManagementContextInternal;
import org.apache.brooklyn.util.time.Duration;
import org.apache.brooklyn.util.time.Time;
import org.eclipse.jetty.server.Server;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/* not the cleanest way to enforce a clean shutdown, but a simple and effective way;
* usage is restricted to BrooklynRestApiLauncher and subclasses, to stop it inline.
* the main app stops the server in a more principled way using callbacks. */
public class ServerStoppingShutdownHandler implements ShutdownHandler {
private static final Logger log = LoggerFactory.getLogger(ServerStoppingShutdownHandler.class);
private final ManagementContext mgmt;
private Server server;
public ServerStoppingShutdownHandler(ManagementContext mgmt) {
this.mgmt = mgmt;
}
@Override
public void onShutdownRequest() {
log.info("Shutting down server (when running in rest-api dev mode, using background thread)");
// essentially same as BrooklynLauncher.terminate() but cut down ...
// NB: this is only used in dev mode use of BrooklynJavascriptGuiLauncher
new Thread(new Runnable() {
public void run() {
Time.sleep(Duration.millis(250));
log.debug("Shutting down server in background thread, closing "+server+" and "+mgmt);
if (server!=null) {
try {
server.stop();
server.join();
} catch (Exception e) {
log.debug("Stopping server gave an error (not usually a concern): "+e);
/* NPE may be thrown e.g. if threadpool not started */
}
}
if (mgmt instanceof ManagementContextInternal) {
((ManagementContextInternal)mgmt).terminate();
}
}
}).start();
}
/** Expect this to be injected; typically it is not known when this is created, but we need it to trigger shutdown. */
public void setServer(Server server) {
this.server = server;
}
}