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com.hazelcast.client.ProxyHelper Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2010, Hazel Ltd. 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;
import com.hazelcast.client.impl.CollectionWrapper;
import com.hazelcast.core.Member;
import com.hazelcast.core.PartitionAware;
import com.hazelcast.impl.ClientServiceException;
import com.hazelcast.impl.ClusterOperation;
import com.hazelcast.logging.ILogger;
import com.hazelcast.query.Predicate;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.EventListener;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import java.util.logging.Level;
import static com.hazelcast.client.IOUtil.toByte;
import static com.hazelcast.client.IOUtil.toObject;
public class ProxyHelper {
private final static AtomicLong callIdGen = new AtomicLong(0);
private final String name;
private final HazelcastClient client;
final ILogger logger = com.hazelcast.logging.Logger.getLogger(this.getClass().getName());
public ProxyHelper(String name, HazelcastClient client) {
this.name = (name == null) ? "" : name;
this.client = client;
}
public String getName() {
return name;
}
protected Packet callAndGetResult(Packet request) {
Call c = createCall(request);
return doCall(c);
}
protected Packet doCall(Call c) {
sendCall(c);
c.sent = System.nanoTime();
final int timeout = 5;
for (int i = 0; ; i++) {
final Object response = c.getResponse(timeout, TimeUnit.SECONDS);
if (response != null) {
c.replied = System.nanoTime();
return (Packet) response;
}
if (i > 0) {
logger.log(Level.INFO, "There is no response for " + c
+ " in " + (timeout * i) + " seconds.");
}
if (!client.isActive()) {
throw new RuntimeException("HazelcastClient is no longer active.");
}
}
}
public void sendCall(final Call c) {
if (c == null) {
throw new NullPointerException();
}
client.getOutRunnable().enQueue(c);
}
public Call createCall(Packet request) {
final Long id = newCallId();
return new Call(id, request) {
@Override
public void onDisconnect(Member member) {
if (!client.getOutRunnable().queue.contains(this)) {
logger.log(Level.FINEST, "Re enqueue " + this);
client.getOutRunnable().enQueue(this);
}
}
};
}
public static Long newCallId() {
return callIdGen.incrementAndGet();
}
private Packet createRequestPacket() {
Packet request = new Packet();
request.setName(name);
request.setThreadId(getCurrentThreadId());
return request;
}
public int getCurrentThreadId() {
return (int) Thread.currentThread().getId();
}
public Packet createRequestPacket(ClusterOperation operation, byte[] key, byte[] value) {
return createRequestPacket(operation, key, value, 0, null);
}
private Packet createRequestPacket(ClusterOperation operation, byte[] key, byte[] value, long ttl, TimeUnit timeunit) {
Packet request = createRequestPacket();
request.setOperation(operation);
request.setKey(key);
request.setValue(value);
if (ttl > 0 && timeunit != null) {
request.setTimeout(timeunit.toMillis(ttl));
}
return request;
}
Future doAsync(final ClusterOperation operation, final Object key, final Object value) {
Packet request = prepareRequest(operation, key, value);
Call remoteCall = createCall(request);
sendCall(remoteCall);
return new AsyncClientCall(remoteCall);
}
protected Object doOp(ClusterOperation operation, Object key, Object value) {
return doOp(operation, key, value, 0, null);
}
public Object doOp(ClusterOperation operation, Object key, Object value, long ttl, TimeUnit timeunit) {
Packet request = prepareRequest(operation, key, value, ttl, timeunit);
Packet response = callAndGetResult(request);
return getValue(response);
}
Packet prepareRequest(ClusterOperation operation, Object key, Object value, long ttl, TimeUnit timeunit) {
byte[] k = null;
byte[] v = null;
if (key != null) {
k = toByte(key);
}
if (value != null) {
v = toByte(value);
}
Packet packet = createRequestPacket(operation, k, v, ttl, timeunit);
if (key instanceof PartitionAware) {
Object partitionKey = ((PartitionAware) key).getPartitionKey();
if (partitionKey == null) throw new IllegalArgumentException("PartitionKey cannot be null!");
packet.setKeyHash(Arrays.hashCode(toByte(partitionKey)));
}
if (value instanceof PartitionAware) {
Object partitionKey = ((PartitionAware) value).getPartitionKey();
if (partitionKey == null) throw new IllegalArgumentException("PartitionKey cannot be null!");
packet.setValueHash(Arrays.hashCode(toByte(partitionKey)));
}
return packet;
}
Packet prepareRequest(ClusterOperation operation, Object key,
Object value) {
return prepareRequest(operation, key, value, 0, null);
}
static Object getValue(Packet response) {
if (response.getValue() != null) {
Object result = toObject(response.getValue());
if (result instanceof ClientServiceException) {
throw new RuntimeException(((ClientServiceException) result).getThrowable());
}
return result;
}
return null;
}
public void destroy() {
doOp(ClusterOperation.DESTROY, null, null);
this.client.destroy(name);
}
public Collection keys(Predicate predicate) {
return ((CollectionWrapper) doOp(ClusterOperation.CONCURRENT_MAP_ITERATE_KEYS, null, predicate)).getKeys();
}
public Collection entries(final Predicate predicate) {
return ((CollectionWrapper) doOp(ClusterOperation.CONCURRENT_MAP_ITERATE_ENTRIES, null, predicate)).getKeys();
}
static void check(Object obj) {
if (obj == null) {
throw new NullPointerException("Object cannot be null.");
}
if (!(obj instanceof Serializable)) {
throw new IllegalArgumentException(obj.getClass().getName() + " is not Serializable.");
}
}
static void check(EventListener listener) {
if (listener == null) {
throw new NullPointerException("Listener can not be null");
}
}
static void checkTime(long time, TimeUnit timeunit) {
if (time < 0) {
throw new IllegalArgumentException("Time can not be less than 0.");
}
if (timeunit == null) {
throw new NullPointerException("TimeUnit can not be null.");
}
}
public HazelcastClient getHazelcastClient() {
return client;
}
}
