com.hazelcast.config.QueueConfig Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, 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.config;
import java.util.ArrayList;
import java.util.List;
import static com.hazelcast.util.Preconditions.checkAsyncBackupCount;
import static com.hazelcast.util.Preconditions.checkBackupCount;
/**
* Contains the configuration for an {@link com.hazelcast.core.IQueue}
*/
public class QueueConfig {
/**
* Default value for the maximum size of the Queue.
*/
public static final int DEFAULT_MAX_SIZE = 0;
/**
* Default value for the sychronous backup count.
*/
public static final int DEFAULT_SYNC_BACKUP_COUNT = 1;
/**
* Default value of the asynchronous backup count.
*/
public static final int DEFAULT_ASYNC_BACKUP_COUNT = 0;
/**
* Default value for the TTL (time to live) for empty Queue.
*/
public static final int DEFAULT_EMPTY_QUEUE_TTL = -1;
private String name;
private List listenerConfigs;
private int backupCount = DEFAULT_SYNC_BACKUP_COUNT;
private int asyncBackupCount = DEFAULT_ASYNC_BACKUP_COUNT;
private int maxSize = DEFAULT_MAX_SIZE;
private int emptyQueueTtl = DEFAULT_EMPTY_QUEUE_TTL;
private QueueStoreConfig queueStoreConfig;
private boolean statisticsEnabled = true;
private QueueConfigReadOnly readOnly;
public QueueConfig() {
}
public QueueConfig(String name) {
setName(name);
}
public QueueConfig(QueueConfig config) {
this();
this.name = config.name;
this.backupCount = config.backupCount;
this.asyncBackupCount = config.asyncBackupCount;
this.maxSize = config.maxSize;
this.emptyQueueTtl = config.emptyQueueTtl;
this.statisticsEnabled = config.statisticsEnabled;
this.queueStoreConfig = config.queueStoreConfig != null ? new QueueStoreConfig(config.queueStoreConfig) : null;
this.listenerConfigs = new ArrayList(config.getItemListenerConfigs());
}
/**
* Returns a read only copy of the queue configuration.
*
* @return A read only copy of the queue configuration.
*/
public QueueConfigReadOnly getAsReadOnly() {
if (readOnly == null) {
readOnly = new QueueConfigReadOnly(this);
}
return readOnly;
}
/**
* Returns the TTL (time to live) for emptying the Queue.
*
* @return The TTL (time to live) for emptying the Queue.
*/
public int getEmptyQueueTtl() {
return emptyQueueTtl;
}
/**
* Sets the TTL (time to live) for emptying the Queue.
*
* @param emptyQueueTtl Set the TTL (time to live) for emptying the Queue to this value.
* @return The Queue configuration.
*/
public QueueConfig setEmptyQueueTtl(int emptyQueueTtl) {
this.emptyQueueTtl = emptyQueueTtl;
return this;
}
/**
* Returns the maximum size of the Queue.
*
* @return The maximum size of the Queue.
*/
public int getMaxSize() {
return maxSize == 0 ? Integer.MAX_VALUE : maxSize;
}
/**
* Sets the maximum size of the Queue.
*
* @param maxSize Set the maximum size of the Queue to this value.
* @return The Queue configuration.
*/
public QueueConfig setMaxSize(int maxSize) {
if (maxSize < 0) {
throw new IllegalArgumentException("Size of the queue can not be a negative value!");
}
this.maxSize = maxSize;
return this;
}
/**
* Get the total number of backups: the backup count plus the asynchronous backup count.
*
* @return The total number of backups.
*/
public int getTotalBackupCount() {
return backupCount + asyncBackupCount;
}
/**
* Get the number of synchronous backups for this queue.
*
* @return The synchronous backup count.
*/
public int getBackupCount() {
return backupCount;
}
/**
* Sets the number of synchronous backups for this queue.
*
* @param backupCount the number of synchronous backups to set
* @return the current QueueConfig
* @throws IllegalArgumentException if backupCount is smaller than 0,
* or larger than the maximum number of backups,
* or the sum of the backups and async backups is larger than the maximum number of backups
* @see #setAsyncBackupCount(int)
*/
public QueueConfig setBackupCount(int backupCount) {
this.backupCount = checkBackupCount(backupCount, asyncBackupCount);
return this;
}
/**
* Get the number of asynchronous backups for this queue.
*
* @return The number of asynchronous backups.
*/
public int getAsyncBackupCount() {
return asyncBackupCount;
}
/**
* Sets the number of asynchronous backups. 0 means no backups.
*
* @param asyncBackupCount the number of asynchronous synchronous backups to set
* @return the updated QueueConfig
* @throws IllegalArgumentException if asyncBackupCount smaller than 0,
* or larger than the maximum number of backup
* or the sum of the backups and async backups is larger than the maximum number of backups
* @see #setBackupCount(int)
* @see #getAsyncBackupCount()
*/
public QueueConfig setAsyncBackupCount(int asyncBackupCount) {
this.asyncBackupCount = checkAsyncBackupCount(backupCount, asyncBackupCount);
return this;
}
/**
* Get the QueueStore (load and store queue items from/to a database) configuration.
*
* @return The QueueStore configuration.
*/
public QueueStoreConfig getQueueStoreConfig() {
return queueStoreConfig;
}
/**
* Set the QueueStore (load and store queue items from/to a database) configuration.
*
* @param queueStoreConfig Set the QueueStore configuration to this configuration.
* @return The QueueStore configuration.
*/
public QueueConfig setQueueStoreConfig(QueueStoreConfig queueStoreConfig) {
this.queueStoreConfig = queueStoreConfig;
return this;
}
/**
* Check if statistics are enabled for this queue.
*
* @return true if statistics are enabled, false otherwise.
*/
public boolean isStatisticsEnabled() {
return statisticsEnabled;
}
/**
* Enables or disables statistics for this queue.
*
* @param statisticsEnabled True to enable statistics for this queue, false to disable.
* @return the updated QueueConfig
*/
public QueueConfig setStatisticsEnabled(boolean statisticsEnabled) {
this.statisticsEnabled = statisticsEnabled;
return this;
}
/**
* @return The name of this queue.
*/
public String getName() {
return name;
}
/**
* Set the name for this queue.
*
* @param name The name to set for this queue.
* @return This queue configuration.
*/
public QueueConfig setName(String name) {
this.name = name;
return this;
}
/**
* Add an item listener configuration to this queue.
*
* @param listenerConfig The item listener configuration to add to this queue.
* @return The updated queue configuration.
*/
public QueueConfig addItemListenerConfig(ItemListenerConfig listenerConfig) {
getItemListenerConfigs().add(listenerConfig);
return this;
}
/**
* Get the list of item listener configurations for this queue.
*
* @return The list of item listener configurations for this queue.
*/
public List getItemListenerConfigs() {
if (listenerConfigs == null) {
listenerConfigs = new ArrayList();
}
return listenerConfigs;
}
/**
* Set the list of item listener configurations for this queue.
*
* @param listenerConfigs The list of item listener configurations to set for this queue.
* @return The updated queue configuration.
*/
public QueueConfig setItemListenerConfigs(List listenerConfigs) {
this.listenerConfigs = listenerConfigs;
return this;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("QueueConfig{");
sb.append("name='").append(name).append('\'');
sb.append(", listenerConfigs=").append(listenerConfigs);
sb.append(", backupCount=").append(backupCount);
sb.append(", asyncBackupCount=").append(asyncBackupCount);
sb.append(", maxSize=").append(maxSize);
sb.append(", emptyQueueTtl=").append(emptyQueueTtl);
sb.append(", queueStoreConfig=").append(queueStoreConfig);
sb.append(", statisticsEnabled=").append(statisticsEnabled);
sb.append('}');
return sb.toString();
}
}