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/**
* The MIT License
* Copyright (c) 2017 LivePerson, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package io.dropwizard.websockets;
import io.dropwizard.Bundle;
import io.dropwizard.metrics.jetty9.websockets.InstWebSocketServerContainerInitializer;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
import org.eclipse.jetty.util.component.AbstractLifeCycle;
import org.eclipse.jetty.util.component.LifeCycle;
import org.eclipse.jetty.websocket.jsr356.server.ServerContainer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.ServletException;
import javax.websocket.DeploymentException;
import javax.websocket.server.ServerEndpoint;
import javax.websocket.server.ServerEndpointConfig;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import static io.dropwizard.websockets.GeneralUtils.rethrow;
public class WebsocketBundle implements Bundle {
private final Collection endpointConfigs = new ArrayList<>();
private static final Logger LOG = LoggerFactory.getLogger(WebsocketBundle.class);
volatile boolean starting = false;
private ServerEndpointConfig.Configurator defaultConfigurator;
public WebsocketBundle(ServerEndpointConfig.Configurator defaultConfigurator, Class... endpoints) {
this(defaultConfigurator, Arrays.asList(endpoints), new ArrayList<>());
}
public WebsocketBundle(Class... endpoints) {
this(null, Arrays.asList(endpoints), new ArrayList<>());
}
public WebsocketBundle(ServerEndpointConfig... configs) {
this(null, new ArrayList<>(), Arrays.asList(configs));
}
public WebsocketBundle(ServerEndpointConfig.Configurator defaultConfigurator, Collection> endpointClasses, Collection serverEndpointConfigs) {
this.defaultConfigurator = defaultConfigurator;
endpointClasses.forEach((clazz)-> addEndpoint(clazz));
this.endpointConfigs.addAll(serverEndpointConfigs);
}
public void addEndpoint(ServerEndpointConfig epC) {
endpointConfigs.add(epC);
if (starting)
throw new RuntimeException("can't add endpoint after starting lifecycle");
}
public void addEndpoint(Class clazz) {
ServerEndpoint anno = clazz.getAnnotation(ServerEndpoint.class);
if(anno == null){
throw new RuntimeException(clazz.getCanonicalName()+" does not have a "+ServerEndpoint.class.getCanonicalName()+" annotation");
}
ServerEndpointConfig.Builder bldr = ServerEndpointConfig.Builder.create(clazz, anno.value());
if(defaultConfigurator != null){
bldr = bldr.configurator(defaultConfigurator);
}
endpointConfigs.add(bldr.build());
if (starting)
throw new RuntimeException("can't add endpoint after starting lifecycle");
}
@Override
public void initialize(Bootstrap bootstrap) {
}
@Override
public void run(Environment environment) {
environment.lifecycle().addLifeCycleListener(new AbstractLifeCycle.AbstractLifeCycleListener() {
@Override
public void lifeCycleStarting(LifeCycle event) {
starting = true;
try {
ServerContainer wsContainer = InstWebSocketServerContainerInitializer.
configureContext(environment.getApplicationContext(), environment.metrics());
StringBuilder sb = new StringBuilder("Registering websocket endpoints: ")
.append(System.lineSeparator())
.append(System.lineSeparator());
endpointConfigs.forEach(rethrow(conf -> addEndpoint(wsContainer, conf, sb)));
LOG.info(sb.toString());
} catch (ServletException ex) {
throw new RuntimeException(ex);
}
}
private void addEndpoint(ServerContainer wsContainer, ServerEndpointConfig conf, StringBuilder sb) throws DeploymentException {
wsContainer.addEndpoint(conf);
sb.append(String.format(" WS %s (%s)", conf.getPath(), conf.getEndpointClass().getName())).append(System.lineSeparator());
}
});
}
}