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/*
* Copyright (c) 2008-2020, 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.proxy;
import com.hazelcast.client.impl.clientside.ClientMessageDecoder;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.RingbufferAddAllCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferAddCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferCapacityCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferHeadSequenceCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferReadManyCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferReadOneCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferRemainingCapacityCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferSizeCodec;
import com.hazelcast.client.impl.protocol.codec.RingbufferTailSequenceCodec;
import com.hazelcast.client.spi.ClientContext;
import com.hazelcast.client.spi.ClientProxy;
import com.hazelcast.client.spi.impl.ClientInvocation;
import com.hazelcast.client.spi.impl.ClientInvocationFuture;
import com.hazelcast.client.util.ClientDelegatingFuture;
import com.hazelcast.core.ICompletableFuture;
import com.hazelcast.core.IFunction;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.partition.strategy.StringPartitioningStrategy;
import com.hazelcast.ringbuffer.OverflowPolicy;
import com.hazelcast.ringbuffer.ReadResultSet;
import com.hazelcast.ringbuffer.Ringbuffer;
import com.hazelcast.ringbuffer.StaleSequenceException;
import com.hazelcast.ringbuffer.impl.client.PortableReadResultSet;
import com.hazelcast.util.executor.CompletedFuture;
import java.util.Collection;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import static com.hazelcast.ringbuffer.impl.RingbufferProxy.MAX_BATCH_SIZE;
import static com.hazelcast.util.CollectionUtil.objectToDataCollection;
import static com.hazelcast.util.ExceptionUtil.rethrow;
import static com.hazelcast.util.Preconditions.checkFalse;
import static com.hazelcast.util.Preconditions.checkNotNegative;
import static com.hazelcast.util.Preconditions.checkNotNull;
import static com.hazelcast.util.Preconditions.checkTrue;
import static java.lang.String.format;
/**
* Proxy implementation of {@link Ringbuffer}.
*
* @param the type of elements in this ringbuffer
*/
public class ClientRingbufferProxy extends ClientProxy implements Ringbuffer {
private static final ClientMessageDecoder ADD_ASYNC_ASYNC_RESPONSE_DECODER = new ClientMessageDecoder() {
@Override
public Long decodeClientMessage(ClientMessage clientMessage) {
return RingbufferAddCodec.decodeResponse(clientMessage).response;
}
};
private static final ClientMessageDecoder ADD_ALL_ASYNC_RESPONSE_DECODER = new ClientMessageDecoder() {
@Override
public Long decodeClientMessage(ClientMessage clientMessage) {
return RingbufferAddAllCodec.decodeResponse(clientMessage).response;
}
};
private ClientMessageDecoder readManyAsyncResponseDecoder;
private int partitionId;
private volatile long capacity = -1;
public ClientRingbufferProxy(String serviceName, String objectName, ClientContext context) {
super(serviceName, objectName, context);
}
@Override
protected void onInitialize() {
String partitionKey = StringPartitioningStrategy.getPartitionKey(name);
partitionId = getContext().getPartitionService().getPartitionId(partitionKey);
readManyAsyncResponseDecoder = new ClientMessageDecoder() {
@Override
public PortableReadResultSet decodeClientMessage(ClientMessage clientMessage) {
final RingbufferReadManyCodec.ResponseParameters params = RingbufferReadManyCodec.decodeResponse(clientMessage);
final PortableReadResultSet readResultSet = new PortableReadResultSet(
params.readCount, params.items, params.itemSeqs,
params.nextSeqExist ? params.nextSeq : ReadResultSet.SEQUENCE_UNAVAILABLE);
readResultSet.setSerializationService(getSerializationService());
return readResultSet;
}
};
}
@Override
public long capacity() {
if (capacity == -1) {
ClientMessage request = RingbufferCapacityCodec.encodeRequest(name);
ClientMessage response = invoke(request, partitionId);
RingbufferCapacityCodec.ResponseParameters resultParameters = RingbufferCapacityCodec.decodeResponse(response);
capacity = resultParameters.response;
}
return capacity;
}
@Override
public long size() {
ClientMessage request = RingbufferSizeCodec.encodeRequest(name);
ClientMessage response = invoke(request, partitionId);
RingbufferSizeCodec.ResponseParameters resultParameters = RingbufferSizeCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public long tailSequence() {
ClientMessage request = RingbufferTailSequenceCodec.encodeRequest(name);
ClientMessage response = invoke(request, partitionId);
RingbufferTailSequenceCodec.ResponseParameters resultParameters = RingbufferTailSequenceCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public long headSequence() {
ClientMessage request = RingbufferHeadSequenceCodec.encodeRequest(name);
ClientMessage response = invoke(request, partitionId);
RingbufferHeadSequenceCodec.ResponseParameters resultParameters = RingbufferHeadSequenceCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public long remainingCapacity() {
ClientMessage request = RingbufferRemainingCapacityCodec.encodeRequest(name);
ClientMessage response = invoke(request, partitionId);
RingbufferRemainingCapacityCodec.ResponseParameters resultParameters
= RingbufferRemainingCapacityCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public long add(E item) {
checkNotNull(item, "item can't be null");
Data element = toData(item);
ClientMessage request = RingbufferAddCodec.encodeRequest(name, OverflowPolicy.OVERWRITE.getId(), element);
ClientMessage response = invoke(request, partitionId);
RingbufferAddCodec.ResponseParameters resultParameters = RingbufferAddCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public ICompletableFuture addAsync(E item, OverflowPolicy overflowPolicy) {
checkNotNull(item, "item can't be null");
checkNotNull(overflowPolicy, "overflowPolicy can't be null");
Data element = toData(item);
ClientMessage request = RingbufferAddCodec.encodeRequest(name, overflowPolicy.getId(), element);
try {
ClientInvocationFuture invocationFuture = new ClientInvocation(getClient(), request, getName(), partitionId).invoke();
return new ClientDelegatingFuture(invocationFuture, getSerializationService(),
ADD_ASYNC_ASYNC_RESPONSE_DECODER);
} catch (Exception e) {
throw rethrow(e);
}
}
@Override
public E readOne(long sequence) throws InterruptedException {
checkSequence(sequence);
ClientMessage request = RingbufferReadOneCodec.encodeRequest(name, sequence);
ClientMessage response = invoke(request, partitionId);
RingbufferReadOneCodec.ResponseParameters resultParameters = RingbufferReadOneCodec.decodeResponse(response);
return toObject(resultParameters.response);
}
@Override
public ICompletableFuture addAllAsync(Collection collection, OverflowPolicy overflowPolicy) {
checkNotNull(collection, "collection can't be null");
checkNotNull(overflowPolicy, "overflowPolicy can't be null");
checkFalse(collection.isEmpty(), "collection can't be empty");
checkTrue(collection.size() <= MAX_BATCH_SIZE, "collection can't be larger than " + MAX_BATCH_SIZE);
Collection dataCollection = objectToDataCollection(collection, getSerializationService());
ClientMessage request = RingbufferAddAllCodec.encodeRequest(name, dataCollection, overflowPolicy.getId());
try {
ClientInvocationFuture invocationFuture = new ClientInvocation(getClient(), request, getName(), partitionId).invoke();
return new ClientDelegatingFuture(invocationFuture, getSerializationService(), ADD_ALL_ASYNC_RESPONSE_DECODER);
} catch (Exception e) {
throw rethrow(e);
}
}
@Override
public ICompletableFuture> readManyAsync(long startSequence, int minCount,
int maxCount, IFunction filter) {
checkSequence(startSequence);
checkNotNegative(minCount, "minCount can't be smaller than 0");
checkTrue(maxCount >= minCount, "maxCount should be equal or larger than minCount");
try {
capacity();
} catch (Throwable e) {
//in case of exception return the exception via future to behave consistently to member
e = new ExecutionException(e);
ExecutorService userExecutor = getContext().getExecutionService().getUserExecutor();
return new CompletedFuture>(getSerializationService(), e, userExecutor);
}
checkTrue(maxCount <= capacity, "the maxCount should be smaller than or equal to the capacity");
checkTrue(maxCount <= MAX_BATCH_SIZE, "maxCount can't be larger than " + MAX_BATCH_SIZE);
ClientMessage request = RingbufferReadManyCodec.encodeRequest(
name,
startSequence,
minCount,
maxCount,
toData(filter));
try {
ClientInvocationFuture invocationFuture = new ClientInvocation(getClient(), request, getName(), partitionId).invoke();
return new ClientDelegatingFuture>(invocationFuture, getSerializationService(),
readManyAsyncResponseDecoder);
} catch (Exception e) {
throw rethrow(e);
}
}
private static void checkSequence(long sequence) {
if (sequence < 0) {
throw new IllegalArgumentException("sequence can't be smaller than 0, but was: " + sequence);
}
}
protected T invoke(ClientMessage clientMessage, int partitionId) {
try {
final Future future = new ClientInvocation(getClient(), clientMessage, getName(), partitionId).invoke();
return (T) future.get();
} catch (ExecutionException e) {
if (e.getCause() instanceof StaleSequenceException) {
StaleSequenceException se = (StaleSequenceException) e.getCause();
long l = headSequence();
throw new StaleSequenceException(se.getMessage(), l);
}
throw rethrow(e);
} catch (Exception e) {
throw rethrow(e);
}
}
@Override
public String toString() {
return format("Ringbuffer{name='%s'}", name);
}
}