org.ehcache.config.builders.PooledExecutionServiceConfigurationBuilder Maven / Gradle / Ivy
Show all versions of ehcache Show documentation
/*
* Copyright Terracotta, 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 org.ehcache.config.builders;
import org.ehcache.config.Builder;
import org.ehcache.impl.config.executor.PooledExecutionServiceConfiguration;
import java.util.HashSet;
import java.util.Set;
/**
* The {@code PooledExecutionServiceConfigurationBuilder} enables building configurations for an
* {@link org.ehcache.core.spi.service.ExecutionService} that is pool based using a fluent style.
*
* As with all Ehcache builders, all instances are immutable and calling any method on the builder will return a new
* instance without modifying the one on which the method was called.
* This enables the sharing of builder instances without any risk of seeing them modified by code elsewhere.
*/
public class PooledExecutionServiceConfigurationBuilder implements Builder {
private Pool defaultPool;
private final Set pools = new HashSet<>();
private PooledExecutionServiceConfigurationBuilder() {
}
private PooledExecutionServiceConfigurationBuilder(PooledExecutionServiceConfigurationBuilder other) {
this.defaultPool = other.defaultPool;
this.pools.addAll(other.pools);
}
/**
* Creates a new instance of {@code PooledExecutionServiceConfigurationBuilder}
*
* @return the builder
*/
public static PooledExecutionServiceConfigurationBuilder newPooledExecutionServiceConfigurationBuilder() {
return new PooledExecutionServiceConfigurationBuilder();
}
/**
* Adds a default pool configuration to the returned builder.
*
* @param alias the pool alias
* @param minSize the minimum number of threads in the pool
* @param maxSize the maximum number of threads in the pool
* @return a new builder with the added default pool
*/
public PooledExecutionServiceConfigurationBuilder defaultPool(String alias, int minSize, int maxSize) {
PooledExecutionServiceConfigurationBuilder other = new PooledExecutionServiceConfigurationBuilder(this);
other.defaultPool = new Pool(alias, minSize, maxSize);
return other;
}
/**
* Adds a pool configuration to the returned builder.
*
* @param alias the pool alias
* @param minSize the minimum number of threads in the pool
* @param maxSize the maximum number of threads in the pool
* @return a new builder with the added default pool
*/
public PooledExecutionServiceConfigurationBuilder pool(String alias, int minSize, int maxSize) {
PooledExecutionServiceConfigurationBuilder other = new PooledExecutionServiceConfigurationBuilder(this);
other.pools.add(new Pool(alias, minSize, maxSize));
return other;
}
/**
* Builds the {@link PooledExecutionServiceConfiguration}
*
* @return the built configuration
*/
@Override
public PooledExecutionServiceConfiguration build() {
PooledExecutionServiceConfiguration config = new PooledExecutionServiceConfiguration();
if (defaultPool != null) {
config.addDefaultPool(defaultPool.alias, defaultPool.minSize, defaultPool.maxSize);
}
for (Pool pool : pools) {
config.addPool(pool.alias, pool.minSize, pool.maxSize);
}
return config;
}
private static class Pool {
private final String alias;
private final int minSize;
private final int maxSize;
Pool(String alias, int minSize, int maxSize) {
this.alias = alias;
this.minSize = minSize;
this.maxSize = maxSize;
}
}
}