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/*
* @(#)MsgStore200.java 1.7 06/29/07
*/
package com.sun.messaging.jmq.jmsserver.persist.file;
import com.sun.messaging.jmq.io.SysMessageID;
import com.sun.messaging.jmq.io.Packet;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
import com.sun.messaging.jmq.jmsserver.util.*;
import com.sun.messaging.jmq.jmsserver.Broker;
import com.sun.messaging.jmq.jmsserver.persist.Store;
import java.io.*;
import java.util.*;
/**
* MsgStore200 is a simple class to load and return messages and the
* associated interest lists from a version 200 message store.
*
* A version 200 message store is
* - a directory of files, one message per file with numeric file names
*
* usage:
* MsgStore200 oldmsgstore = new MsgStore200(File msgdir);
* while (oldmsgstore.hasMoreMessages()) {
* Packet msg = oldmsgstore.nextMessage();
* ConsumerUID[] iids = oldmsgstore.nextCUIDs();
* int[] states = oldmsgstore.nextStates();
*
* // do something with the message and it's interest list
* }
* oldmsgstore.close();
*/
class MsgStore200 extends RandomAccessStore {
// if hasMoreMessages() returns true, the following variables
// holds the next message and it's interest list
private Packet msgToReturn = null;
private ConsumerUID[] iidsToReturn = null;
private int[] statesToReturn = null;
private Enumeration msgenum = null;
// accept everything
private static FilenameFilter filenameFilter = new FilenameFilter() {
public boolean accept(File dir, String name) {
return true;
}
};
/**
* When instantiated, all messages are loaded.
*/
MsgStore200(File msgDir) throws BrokerException {
super(msgDir, 0, 0, 0);
msgenum = getEnumeration(false); // false->not peekonly
if (Store.getDEBUG()) {
logger.log(logger.DEBUG, "Loading version 200 message store");
}
}
//
// Implement Enumeration methods
//
boolean hasMoreMessages() {
return msgenum.hasMoreElements();
}
Packet nextMessage() {
return msgToReturn;
}
ConsumerUID[] nextCUIDs() {
return iidsToReturn;
}
int[] nextStates() {
return statesToReturn;
}
// implement super class abstract method
/**
* parse the message and it's associated interest list from
* the given buffers.
* Returns the sysMessageID.
*/
Object parseData(byte[] data, byte[] attachment) throws IOException {
// parse message
ByteArrayInputStream bais = new ByteArrayInputStream(data);
msgToReturn = new Packet(false);
msgToReturn.generateTimestamp(false);
msgToReturn.generateSequenceNumber(false);
msgToReturn.readPacket(bais);
bais.close();
int size = 0;
// parse interest list
if (attachment != null && attachment.length > 0) {
ByteArrayInputStream bis = new ByteArrayInputStream(attachment);
DataInputStream dis = new DataInputStream(bis);
// read in number of entries
size = dis.readInt();
iidsToReturn = new ConsumerUID[size];
statesToReturn = new int[size];
for (int i = 0; i < size; i++) {
iidsToReturn[i] = new ConsumerUID(dis.readLong());
statesToReturn[i] = dis.readInt();
}
dis.close();
bis.close();
}
SysMessageID mid = msgToReturn.getSysMessageID();
if (Store.getDEBUG()) {
logger.log(logger.DEBUG,
"loaded " + mid + " with " + size + " interest states");
}
return mid;
}
// print out informational message
protected void close() {
super.close(true);
}
FilenameFilter getFilenameFilter() {
return filenameFilter;
}
}