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Kubernetes Service Discovery for Hazelcast Discovery SPI
/*
* Copyright (c) 2008-2019, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.client.connection.nio;
import com.hazelcast.client.connection.ClientConnectionManager;
import com.hazelcast.client.impl.clientside.HazelcastClientInstanceImpl;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.spi.impl.listener.AbstractClientListenerService;
import com.hazelcast.core.LifecycleService;
import com.hazelcast.instance.BuildInfo;
import com.hazelcast.internal.metrics.Probe;
import com.hazelcast.internal.metrics.ProbeLevel;
import com.hazelcast.internal.networking.Channel;
import com.hazelcast.internal.networking.OutboundFrame;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.Connection;
import com.hazelcast.nio.ConnectionType;
import com.hazelcast.util.function.Consumer;
import com.hazelcast.nio.EndpointManager;
import java.io.EOFException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.channels.CancelledKeyException;
import java.util.concurrent.atomic.AtomicLong;
import static com.hazelcast.util.StringUtil.timeToStringFriendly;
/**
* Client implementation of {@link Connection}.
* ClientConnection is a connection between a Hazelcast Client and a Hazelcast Member.
*/
public class ClientConnection implements Connection {
@Probe
private final int connectionId;
private final ILogger logger;
private final Channel channel;
private final ClientConnectionManagerImpl connectionManager;
private final LifecycleService lifecycleService;
private final HazelcastClientInstanceImpl client;
private final long startTime = System.currentTimeMillis();
private final Consumer responseHandler;
private volatile Address remoteEndpoint;
private volatile boolean isAuthenticatedAsOwner;
@Probe(level = ProbeLevel.DEBUG)
private final AtomicLong closedTime = new AtomicLong();
private volatile Throwable closeCause;
private volatile String closeReason;
private int connectedServerVersion = BuildInfo.UNKNOWN_HAZELCAST_VERSION;
private String connectedServerVersionString;
public ClientConnection(HazelcastClientInstanceImpl client, int connectionId, Channel channel) {
this.client = client;
this.responseHandler = client.getInvocationService().getResponseHandler();
this.connectionManager = (ClientConnectionManagerImpl) client.getConnectionManager();
this.lifecycleService = client.getLifecycleService();
this.channel = channel;
channel.attributeMap().put(ClientConnection.class, this);
this.connectionId = connectionId;
this.logger = client.getLoggingService().getLogger(ClientConnection.class);
}
public ClientConnection(HazelcastClientInstanceImpl client, int connectionId) {
this.client = client;
this.responseHandler = client.getInvocationService().getResponseHandler();
this.connectionManager = (ClientConnectionManagerImpl) client.getConnectionManager();
this.lifecycleService = client.getLifecycleService();
this.connectionId = connectionId;
this.channel = null;
this.logger = client.getLoggingService().getLogger(ClientConnection.class);
}
@Override
public boolean write(OutboundFrame frame) {
if (channel.write(frame)) {
return true;
}
if (logger.isFinestEnabled()) {
logger.finest("Connection is closed, dropping frame -> " + frame);
}
return false;
}
@Override
public Address getEndPoint() {
return remoteEndpoint;
}
@Override
public boolean isAlive() {
return closedTime.get() == 0;
}
@Override
public long lastReadTimeMillis() {
return channel.lastReadTimeMillis();
}
@Override
public long lastWriteTimeMillis() {
return channel.lastWriteTimeMillis();
}
@Override
public void setType(ConnectionType type) {
//NO OP
}
@Override
public ConnectionType getType() {
return ConnectionType.JAVA_CLIENT;
}
@Override
public boolean isClient() {
return true;
}
@Override
public InetAddress getInetAddress() {
return channel.socket().getInetAddress();
}
@Override
public InetSocketAddress getRemoteSocketAddress() {
return (InetSocketAddress) channel.remoteSocketAddress();
}
@Override
public int getPort() {
return channel.socket().getPort();
}
@Override
public EndpointManager getEndpointManager() {
throw new UnsupportedOperationException();
}
public ClientConnectionManager getConnectionManager() {
return connectionManager;
}
public void setRemoteEndpoint(Address remoteEndpoint) {
this.remoteEndpoint = remoteEndpoint;
}
public InetSocketAddress getLocalSocketAddress() {
return (InetSocketAddress) channel.localSocketAddress();
}
@Override
public void close(String reason, Throwable cause) {
if (!closedTime.compareAndSet(0, System.currentTimeMillis())) {
return;
}
closeCause = cause;
closeReason = reason;
logClose();
try {
innerClose();
} catch (Exception e) {
logger.warning("Exception while closing connection" + e.getMessage());
}
connectionManager.onClose(this);
client.getMetricsRegistry().discardMetrics(this);
}
private void logClose() {
String message = toString() + " closed. Reason: ";
if (closeReason != null) {
message += closeReason;
} else if (closeCause != null) {
message += closeCause.getClass().getName() + "[" + closeCause.getMessage() + "]";
} else {
message += "Socket explicitly closed";
}
if (lifecycleService.isRunning()) {
if (closeCause == null || closeCause instanceof EOFException || closeCause instanceof CancelledKeyException) {
logger.info(message);
} else {
logger.warning(message, closeCause);
}
} else {
if (closeCause == null) {
logger.finest(message);
} else {
logger.finest(message, closeCause);
}
}
}
protected void innerClose() throws IOException {
channel.close();
}
@Override
public Throwable getCloseCause() {
return closeCause;
}
@Override
public String getCloseReason() {
if (closeReason == null) {
return closeCause == null ? null : closeCause.getMessage();
} else {
return closeReason;
}
}
public void handleClientMessage(ClientMessage message) {
if (message.isFlagSet(ClientMessage.LISTENER_EVENT_FLAG)) {
AbstractClientListenerService listenerService = (AbstractClientListenerService) client.getListenerService();
listenerService.handleClientMessage(message);
} else {
responseHandler.accept(message);
}
}
public boolean isAuthenticatedAsOwner() {
return isAuthenticatedAsOwner;
}
public void setIsAuthenticatedAsOwner() {
this.isAuthenticatedAsOwner = true;
}
public long getStartTime() {
return startTime;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ClientConnection)) {
return false;
}
ClientConnection that = (ClientConnection) o;
return connectionId == that.connectionId;
}
@Override
public int hashCode() {
return connectionId;
}
@Override
public String toString() {
return "ClientConnection{"
+ "alive=" + isAlive()
+ ", connectionId=" + connectionId
+ ", channel=" + channel
+ ", remoteEndpoint=" + remoteEndpoint
+ ", lastReadTime=" + timeToStringFriendly(lastReadTimeMillis())
+ ", lastWriteTime=" + timeToStringFriendly(lastWriteTimeMillis())
+ ", closedTime=" + timeToStringFriendly(closedTime.get())
+ ", connected server version=" + connectedServerVersionString
+ '}';
}
public void setConnectedServerVersion(String connectedServerVersion) {
this.connectedServerVersionString = connectedServerVersion;
this.connectedServerVersion = BuildInfo.calculateVersion(connectedServerVersion);
}
public int getConnectedServerVersion() {
return connectedServerVersion;
}
public String getConnectedServerVersionString() {
return connectedServerVersionString;
}
}