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WatcherWebSocketListener.java
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WatcherWebSocketListener.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.dsl.internal;
import io.fabric8.kubernetes.api.model.HasMetadata;
import io.fabric8.kubernetes.client.http.WebSocket;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
class WatcherWebSocketListener<T extends HasMetadata> implements WebSocket.Listener {
protected static final Logger logger = LoggerFactory.getLogger(WatcherWebSocketListener.class);
protected final AbstractWatchManager<T> manager;
private boolean reconnected = false;
protected WatcherWebSocketListener(AbstractWatchManager<T> manager) {
this.manager = manager;
}
@Override
public void onOpen(final WebSocket webSocket) {
logger.debug("WebSocket successfully opened");
manager.resetReconnectAttempts();
}
@Override
public void onError(WebSocket webSocket, Throwable t) {
logger.debug("WebSocket error received", t);
scheduleReconnect();
}
@Override
public void onMessage(WebSocket webSocket, String text) {
// onMesssage and onClose are serialized, but it's not specified if onError
// may occur simultaneous with onMessage. So we prevent concurrent processing
try {
synchronized (this) {
manager.onMessage(text);
}
} finally {
webSocket.request();
}
}
@Override
public void onMessage(WebSocket webSocket, ByteBuffer bytes) {
onMessage(webSocket, StandardCharsets.UTF_8.decode(bytes).toString());
}
@Override
public void onClose(WebSocket webSocket, int code, String reason) {
logger.debug("WebSocket close received. code: {}, reason: {}", code, reason);
webSocket.sendClose(code, reason);
scheduleReconnect();
}
private synchronized void scheduleReconnect() {
if (!reconnected) {
manager.scheduleReconnect();
reconnected = true;
}
}
}