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The official Couchbase JVM Core IO Library
/**
* Copyright (c) 2015 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.service;
import com.couchbase.client.core.ResponseEvent;
import com.couchbase.client.core.endpoint.Endpoint;
import com.couchbase.client.core.env.CoreEnvironment;
import com.couchbase.client.core.message.CouchbaseRequest;
import com.couchbase.client.core.retry.RetryHelper;
import com.couchbase.client.core.service.strategies.SelectionStrategy;
import com.couchbase.client.deps.com.lmax.disruptor.RingBuffer;
/**
* Abstract implementation of a (fixed size) pooling Service.
*
* @author Michael Nitschinger
* @since 1.1.0
*/
public abstract class AbstractPoolingService extends AbstractDynamicService {
private final int maxEndpoints;
private final RingBuffer responseBuffer;
private final SelectionStrategy strategy;
private final CoreEnvironment env;
protected AbstractPoolingService(String hostname, String bucket, String password, int port,
CoreEnvironment env, int minEndpoints, int maxEndpoints, SelectionStrategy strategy,
RingBuffer responseBuffer, EndpointFactory endpointFactory) {
super(hostname, bucket, password, port, env, minEndpoints, responseBuffer, endpointFactory);
this.maxEndpoints = maxEndpoints;
this.responseBuffer = responseBuffer;
this.strategy = strategy;
this.env = env;
}
@Override
protected void dispatch(final CouchbaseRequest request) {
if (endpoints().length == maxEndpoints) {
Endpoint endpoint = strategy.select(request, endpoints());
if (endpoint == null) {
RetryHelper.retryOrCancel(env, request, responseBuffer);
} else {
endpoint.send(request);
}
} else {
throw new UnsupportedOperationException("Dynamic endpoint scaling is currently not supported.");
}
}
}