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ProtocolConsumerUIDIterator.java
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ProtocolConsumerUIDIterator.java
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/*
* Copyright (c) 2000, 2017 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2022 Contributors to Eclipse Foundation. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.messaging.jmq.jmsserver.multibroker.raptor;
import java.util.*;
import java.io.*;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
import com.sun.messaging.jmq.jmsserver.core.BrokerAddress;
/**
* A helper class to read list of ConsumerUIDs in cluster protocols
*/
public class ProtocolConsumerUIDIterator implements Iterator {
private int count = 0;
private int count_read = 0;
private DataInputStream dis = null;
private BrokerAddress from = null;
public ProtocolConsumerUIDIterator(byte[] payload, int count, BrokerAddress from) {
ByteArrayInputStream bis = new ByteArrayInputStream(payload);
dis = new DataInputStream(bis);
this.count = count;
this.count_read = 0;
this.from = from;
}
public ProtocolConsumerUIDIterator(DataInputStream dis, int count) {
this.dis = dis;
this.count = count;
this.count_read = 0;
}
@Override
public boolean hasNext() {
if (count_read < 0) {
throw new IllegalStateException("ConsumerUIDIterator");
}
return count_read < count;
}
/**
* Caller must catch RuntimeException and getCause
*
* @throws RuntimeException
*/
@Override
public Object next() {
try {
ConsumerUID cid = ClusterConsumerInfo.readConsumerUID(dis);
if (from != null) {
cid.setBrokerAddress(from);
}
count_read++;
return cid;
} catch (IOException e) {
count_read = -1;
throw new RuntimeException(e);
}
}
@Override
public void remove() {
throw new UnsupportedOperationException("Not supported");
}
}