/*
* Copyright (c) 2008-2013, 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.queue.client;
import com.hazelcast.client.CallableClientRequest;
import com.hazelcast.client.RetryableRequest;
import com.hazelcast.nio.serialization.PortableReader;
import com.hazelcast.nio.serialization.PortableWriter;
import com.hazelcast.queue.QueueContainer;
import com.hazelcast.queue.QueuePortableHook;
import com.hazelcast.queue.QueueService;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.QueuePermission;
import java.io.IOException;
import java.security.Permission;
/**
* @author ali 5/23/13
*/
public class RemainingCapacityRequest extends CallableClientRequest implements RetryableRequest {
protected String name;
public RemainingCapacityRequest() {
}
public RemainingCapacityRequest(String name) {
this.name = name;
}
public int getFactoryId() {
return QueuePortableHook.F_ID;
}
public int getClassId() {
return QueuePortableHook.REMAINING_CAPACITY;
}
public void write(PortableWriter writer) throws IOException {
writer.writeUTF("n", name);
}
public void read(PortableReader reader) throws IOException {
name = reader.readUTF("n");
}
public Object call() throws Exception {
QueueService service = getService();
QueueContainer container = service.getOrCreateContainer(name, false);
return container.getConfig().getMaxSize() - container.size();
}
public String getServiceName() {
return QueueService.SERVICE_NAME;
}
public Permission getRequiredPermission() {
return new QueuePermission(name, ActionConstants.ACTION_READ);
}
}