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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.config;
import com.hazelcast.collection.IQueue;
import com.hazelcast.internal.config.ConfigDataSerializerHook;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import static com.hazelcast.internal.serialization.impl.SerializationUtil.readNullableList;
import static com.hazelcast.internal.serialization.impl.SerializationUtil.writeNullableList;
import static com.hazelcast.internal.util.Preconditions.checkAsyncBackupCount;
import static com.hazelcast.internal.util.Preconditions.checkBackupCount;
import static com.hazelcast.internal.util.Preconditions.checkNotNull;
/**
* Contains the configuration for an {@link IQueue}.
*/
@SuppressWarnings("checkstyle:methodcount")
public class QueueConfig implements IdentifiedDataSerializable, NamedConfig {
/**
* Default value for the maximum size of the Queue.
*/
public static final int DEFAULT_MAX_SIZE = 0;
/**
* Default value for the synchronous 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 String splitBrainProtectionName;
private MergePolicyConfig mergePolicyConfig = new MergePolicyConfig();
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.splitBrainProtectionName = config.splitBrainProtectionName;
this.mergePolicyConfig = config.mergePolicyConfig;
this.queueStoreConfig = config.queueStoreConfig != null ? new QueueStoreConfig(config.queueStoreConfig) : null;
this.listenerConfigs = new ArrayList(config.getItemListenerConfigs());
}
/**
* 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 {@code true} if statistics are enabled, {@code false} otherwise
*/
public boolean isStatisticsEnabled() {
return statisticsEnabled;
}
/**
* Enables or disables statistics for this queue.
*
* @param statisticsEnabled {@code true} to enable statistics for this queue, {@code 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;
}
/**
* Returns the split brain protection name for queue operations.
*
* @return the split brain protection name
*/
public String getSplitBrainProtectionName() {
return splitBrainProtectionName;
}
/**
* Sets the split brain protection name for queue operations.
*
* @param splitBrainProtectionName the split brain protection name
* @return the updated queue configuration
*/
public QueueConfig setSplitBrainProtectionName(String splitBrainProtectionName) {
this.splitBrainProtectionName = splitBrainProtectionName;
return this;
}
/**
* Gets the {@link MergePolicyConfig} for this queue.
*
* @return the {@link MergePolicyConfig} for this queue
*/
public MergePolicyConfig getMergePolicyConfig() {
return mergePolicyConfig;
}
/**
* Sets the {@link MergePolicyConfig} for this queue.
*
* @return the updated queue configuration
*/
public QueueConfig setMergePolicyConfig(MergePolicyConfig mergePolicyConfig) {
this.mergePolicyConfig = checkNotNull(mergePolicyConfig, "mergePolicyConfig cannot be null");
return this;
}
@Override
public String toString() {
return "QueueConfig{"
+ "name='" + name + '\''
+ ", listenerConfigs=" + listenerConfigs
+ ", backupCount=" + backupCount
+ ", asyncBackupCount=" + asyncBackupCount
+ ", maxSize=" + maxSize
+ ", emptyQueueTtl=" + emptyQueueTtl
+ ", queueStoreConfig=" + queueStoreConfig
+ ", statisticsEnabled=" + statisticsEnabled
+ ", mergePolicyConfig=" + mergePolicyConfig
+ '}';
}
@Override
public int getFactoryId() {
return ConfigDataSerializerHook.F_ID;
}
@Override
public int getClassId() {
return ConfigDataSerializerHook.QUEUE_CONFIG;
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeUTF(name);
writeNullableList(listenerConfigs, out);
out.writeInt(backupCount);
out.writeInt(asyncBackupCount);
out.writeInt(maxSize);
out.writeInt(emptyQueueTtl);
out.writeObject(queueStoreConfig);
out.writeBoolean(statisticsEnabled);
out.writeUTF(splitBrainProtectionName);
out.writeObject(mergePolicyConfig);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
name = in.readUTF();
listenerConfigs = readNullableList(in);
backupCount = in.readInt();
asyncBackupCount = in.readInt();
maxSize = in.readInt();
emptyQueueTtl = in.readInt();
queueStoreConfig = in.readObject();
statisticsEnabled = in.readBoolean();
splitBrainProtectionName = in.readUTF();
mergePolicyConfig = in.readObject();
}
@Override
public final boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof QueueConfig)) {
return false;
}
QueueConfig that = (QueueConfig) o;
return backupCount == that.backupCount
&& asyncBackupCount == that.asyncBackupCount
&& getMaxSize() == that.getMaxSize()
&& emptyQueueTtl == that.emptyQueueTtl
&& statisticsEnabled == that.statisticsEnabled
&& Objects.equals(name, that.name)
&& getItemListenerConfigs().equals(that.getItemListenerConfigs())
&& Objects.equals(queueStoreConfig, that.queueStoreConfig)
&& Objects.equals(splitBrainProtectionName, that.splitBrainProtectionName)
&& Objects.equals(mergePolicyConfig, that.mergePolicyConfig);
}
@Override
public final int hashCode() {
return Objects.hash(name, getItemListenerConfigs(), backupCount, asyncBackupCount, getMaxSize(), emptyQueueTtl,
queueStoreConfig, statisticsEnabled, splitBrainProtectionName, mergePolicyConfig);
}
}
