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WatchEventsListener.java
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WatchEventsListener.java
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/*
* Copyright (C) 2015 Red Hat, Inc.
*
* 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 io.fabric8.kubernetes.client.server.mock;
import com.fasterxml.jackson.core.JsonProcessingException;
import io.fabric8.kubernetes.api.model.GenericKubernetesResource;
import io.fabric8.kubernetes.api.model.WatchEvent;
import io.fabric8.kubernetes.client.Watcher;
import io.fabric8.kubernetes.client.utils.Serialization;
import io.fabric8.mockwebserver.Context;
import io.fabric8.mockwebserver.crud.AttributeSet;
import io.fabric8.mockwebserver.http.Response;
import io.fabric8.mockwebserver.http.WebSocket;
import io.fabric8.mockwebserver.http.WebSocketListener;
import io.fabric8.mockwebserver.internal.WebSocketMessage;
import org.slf4j.Logger;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
class WatchEventsListener extends WebSocketListener {
private final AtomicReference<WebSocket> webSocketRef = new AtomicReference<>();
private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
private final AttributeSet attributeSet;
private final Context context;
private final Set<WatchEventsListener> watchEventListenerList;
private final Logger logger;
private final Consumer<WatchEventsListener> onOpenAction;
public WatchEventsListener(Context context, AttributeSet attributeSet, final Set<WatchEventsListener> watchEventListenerList,
Logger logger, Consumer<WatchEventsListener> onOpenAction) {
this.logger = logger;
this.context = context;
this.attributeSet = attributeSet;
this.watchEventListenerList = watchEventListenerList;
this.onOpenAction = onOpenAction;
}
public boolean attributeMatches(AttributeSet set) {
return set.matches(attributeSet);
}
@Override
public void onOpen(WebSocket webSocket, Response response) {
webSocketRef.set(webSocket);
onOpenAction.accept(this);
}
@Override
public void onClosing(WebSocket webSocket, int code, String reason) {
webSocketRef.get().close(code, reason);
}
@Override
public void onClosed(WebSocket webSocket, int code, String reason) {
if (webSocketRef.get() != null) {
webSocketRef.get().close(code, reason);
}
executor.shutdown();
try {
executor.awaitTermination(1, TimeUnit.MINUTES);
} catch (InterruptedException e) {
logger.debug("Interrupted waiting for the executor service to shutdown: {}", e.getMessage());
Thread.currentThread().interrupt();
}
watchEventListenerList.remove(this);
}
@Override
public void onFailure(WebSocket webSocket, Throwable t, Response response) {
webSocket.close(1000, t.getMessage());
executor.shutdown();
try {
executor.awaitTermination(1, TimeUnit.MINUTES);
} catch (InterruptedException e) {
logger.debug("Interrupted waiting for the executor service to shutdown: {}", e.getMessage());
Thread.currentThread().interrupt();
}
watchEventListenerList.remove(this);
}
public void sendWebSocketResponse(String object, Watcher.Action action) {
WebSocketMessage message = toWebSocketMessage(context,
new WatchEvent(Serialization.unmarshal(object, GenericKubernetesResource.class), action.name()));
executor.schedule(() -> webSocketRef.get().send(message.getBody()), message.getDelay(), TimeUnit.SECONDS);
}
private static WebSocketMessage toWebSocketMessage(Context context, Object content) {
return toWebSocketMessage(context, content, true);
}
private static WebSocketMessage toWebSocketMessage(Context context, Object content, Boolean toBeRemoved) {
return toWebSocketMessage(context, 0L, content, toBeRemoved);
}
private static WebSocketMessage toWebSocketMessage(Context context, Long delay, Object content, Boolean toBeRemoved) {
if (content instanceof String) {
return new WebSocketMessage(delay, (String) content, toBeRemoved);
} else if (content instanceof WebSocketMessage) {
return (WebSocketMessage) content;
} else {
try {
return toWebSocketMessage(context, delay, context.getMapper().writeValueAsString(content), toBeRemoved);
} catch (JsonProcessingException e) {
throw new IllegalArgumentException(e);
}
}
}
}