org.apache.catalina.tribes.UniqueId Java Examples

/**
 * Send a message to one or more members in the cluster
 * @param destination Member[] - the destinations, null or zero length means all
 * @param msg ClusterMessage - the message to send
 * @param payload TBA
 */
@Override
public void sendMessage(Member[] destination, ChannelMessage msg, InterceptorPayload payload)
        throws ChannelException {
    if ( destination == null ) destination = membershipService.getMembers();
    if ((msg.getOptions()&Channel.SEND_OPTIONS_MULTICAST) == Channel.SEND_OPTIONS_MULTICAST) {
        membershipService.broadcast(msg);
    } else {
        clusterSender.sendMessage(msg,destination);
    }
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Sent msg:" + new UniqueId(msg.getUniqueId()) +
                " at " + new java.sql.Timestamp(System.currentTimeMillis()) + " to " +
                Arrays.toNameString(destination));
    }
}
 

@Override
public void heartbeat() {
    try {
        long now = System.currentTimeMillis();
        @SuppressWarnings("unchecked")
        Map.Entry<UniqueId,MapEntry>[] entries = messages.entrySet().toArray(new Map.Entry[messages.size()]);
        for (int i=0; i<entries.length; i++ ) {
            MapEntry entry = entries[i].getValue();
            if ( entry.expired(now,expire) ) {
                if(log.isInfoEnabled())
                    log.info("Message ["+entry.id+"] has expired. Removing.");
                messages.remove(entry.id);
            }//end if
        }
    } catch ( Exception x ) {
        log.warn("Unable to perform heartbeat on the TwoPhaseCommit interceptor.",x);
    } finally {
        super.heartbeat();
    }
}
 

@Override
public void heartbeat() {
    try {
        long now = System.currentTimeMillis();
        @SuppressWarnings("unchecked")
        Map.Entry<UniqueId,MapEntry>[] entries = messages.entrySet().toArray(new Map.Entry[messages.size()]);
        for (int i=0; i<entries.length; i++ ) {
            MapEntry entry = entries[i].getValue();
            if ( entry.expired(now,expire) ) {
                if(log.isInfoEnabled())
                    log.info("Message ["+entry.id+"] has expired. Removing.");
                messages.remove(entry.id);
            }//end if
        }
    } catch ( Exception x ) {
        log.warn("Unable to perform heartbeat on the TwoPhaseCommit interceptor.",x);
    } finally {
        super.heartbeat();
    }
}
 

@Override
public void heartbeat() {
    try {
        long now = System.currentTimeMillis();
        @SuppressWarnings("unchecked")
        Map.Entry<UniqueId,MapEntry>[] entries = messages.entrySet().toArray(new Map.Entry[messages.size()]);
        for (int i=0; i<entries.length; i++ ) {
            MapEntry entry = entries[i].getValue();
            if ( entry.expired(now,expire) ) {
                if(log.isInfoEnabled())
                    log.info("Message ["+entry.id+"] has expired. Removing.");
                messages.remove(entry.id);
            }//end if
        }
    } catch ( Exception x ) {
        log.warn(sm.getString("twoPhaseCommitInterceptor.heartbeat.failed"),x);
    } finally {
        super.heartbeat();
    }
}
 

public void parse() {
    //header
    int offset = 16;
    //leader
    int ldrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] ldr = new byte[ldrLen];
    System.arraycopy(buf.getBytesDirect(),offset,ldr,0,ldrLen);
    leader = MemberImpl.getMember(ldr);
    offset += ldrLen;
    //source
    int srcLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] src = new byte[srcLen];
    System.arraycopy(buf.getBytesDirect(),offset,src,0,srcLen);
    source = MemberImpl.getMember(src);
    offset += srcLen;
    //view
    int mbrCount = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    view = new Member[mbrCount];
    for (int i=0; i<view.length; i++ ) {
        int mbrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
        offset += 4;
        byte[] mbr = new byte[mbrLen];
        System.arraycopy(buf.getBytesDirect(), offset, mbr, 0, mbrLen);
        view[i] = MemberImpl.getMember(mbr);
        offset += mbrLen;
    }
    //id
    this.id = new UniqueId(buf.getBytesDirect(),offset,16);
    offset += 16;
    type = new byte[16];
    System.arraycopy(buf.getBytesDirect(), offset, type, 0, type.length);
    offset += 16;

}
 

private CoordinationMessage createElectionMsg(MemberImpl local, MemberImpl[] others, MemberImpl leader) {
    Membership m = new Membership(local,AbsoluteOrder.comp,true);
    Arrays.fill(m,others);
    MemberImpl[] mbrs = m.getMembers();
    m.reset(); 
    CoordinationMessage msg = new CoordinationMessage(leader, local, mbrs,new UniqueId(UUIDGenerator.randomUUID(true)), COORD_REQUEST);
    return msg;
}
 

private CoordinationMessage createElectionMsg(MemberImpl local, MemberImpl[] others, MemberImpl leader) {
    Membership m = new Membership(local,AbsoluteOrder.comp,true);
    Arrays.fill(m,others);
    MemberImpl[] mbrs = m.getMembers();
    m.reset(); 
    CoordinationMessage msg = new CoordinationMessage(leader, local, mbrs,new UniqueId(UUIDGenerator.randomUUID(true)), COORD_REQUEST);
    return msg;
}
 

@Override
public void messageReceived(ChannelMessage msg) {
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Received msg:" + new UniqueId(msg.getUniqueId()) + " at " +new java.sql.Timestamp(System.currentTimeMillis())+ " from "+msg.getAddress().getName());
    }
    super.messageReceived(msg);
}
 

@Override
public void messageReceived(ChannelMessage msg) {
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Received msg:" + new UniqueId(msg.getUniqueId()) + " at " +new java.sql.Timestamp(System.currentTimeMillis())+ " from "+msg.getAddress().getName());
    }
    super.messageReceived(msg);
}
 

/**
 * Send a message to one or more members in the cluster
 * @param destination Member[] - the destinations, null or zero length means all
 * @param msg ClusterMessage - the message to send
 * @param payload TBA
 */
@Override
public void sendMessage(Member[] destination, ChannelMessage msg, InterceptorPayload payload) throws ChannelException {
    if ( destination == null ) destination = membershipService.getMembers();
    if ((msg.getOptions()&Channel.SEND_OPTIONS_MULTICAST) == Channel.SEND_OPTIONS_MULTICAST) {
        membershipService.broadcast(msg);
    } else {
        clusterSender.sendMessage(msg,destination);
    }
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Sent msg:" + new UniqueId(msg.getUniqueId()) + " at " +new java.sql.Timestamp(System.currentTimeMillis())+ " to "+Arrays.toNameString(destination));
    }
}
 

public CoordinationMessage(MemberImpl leader,
                           MemberImpl source, 
                           MemberImpl[] view,
                           UniqueId id,
                           byte[] type) {
    this.buf = new XByteBuffer(4096,false);
    this.leader = leader;
    this.source = source;
    this.view = view;
    this.id = id;
    this.type = type;
    this.write();
}
 

public CoordinationMessage(MemberImpl leader,
                           MemberImpl source, 
                           MemberImpl[] view,
                           UniqueId id,
                           byte[] type) {
    this.buf = new XByteBuffer(4096,false);
    this.leader = leader;
    this.source = source;
    this.view = view;
    this.id = id;
    this.type = type;
    this.write();
}
 

/**
 * Send a message to one or more members in the cluster
 * @param destination Member[] - the destinations, null or zero length means all
 * @param msg ClusterMessage - the message to send
 * @param payload TBA
 */
@Override
public void sendMessage(Member[] destination, ChannelMessage msg, InterceptorPayload payload) throws ChannelException {
    if ( destination == null ) destination = membershipService.getMembers();
    if ((msg.getOptions()&Channel.SEND_OPTIONS_MULTICAST) == Channel.SEND_OPTIONS_MULTICAST) {
        membershipService.broadcast(msg);
    } else {
        clusterSender.sendMessage(msg,destination);
    }
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Sent msg:" + new UniqueId(msg.getUniqueId()) + " at " +new java.sql.Timestamp(System.currentTimeMillis())+ " to "+Arrays.toNameString(destination));
    }
}
 

public void parse() {
    //header
    int offset = 16;
    //leader
    int ldrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] ldr = new byte[ldrLen];
    System.arraycopy(buf.getBytesDirect(),offset,ldr,0,ldrLen);
    leader = MemberImpl.getMember(ldr);
    offset += ldrLen;
    //source
    int srcLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] src = new byte[srcLen];
    System.arraycopy(buf.getBytesDirect(),offset,src,0,srcLen);
    source = MemberImpl.getMember(src);
    offset += srcLen;
    //view
    int mbrCount = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    view = new MemberImpl[mbrCount];
    for (int i=0; i<view.length; i++ ) {
        int mbrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
        offset += 4;
        byte[] mbr = new byte[mbrLen];
        System.arraycopy(buf.getBytesDirect(), offset, mbr, 0, mbrLen);
        view[i] = MemberImpl.getMember(mbr);
        offset += mbrLen;
    }
    //id
    this.id = new UniqueId(buf.getBytesDirect(),offset,16);
    offset += 16;
    type = new byte[16];
    System.arraycopy(buf.getBytesDirect(), offset, type, 0, type.length);
    offset += 16;
    
}
 

public CoordinationMessage(Member leader,
                           Member source,
                           Member[] view,
                           UniqueId id,
                           byte[] type) {
    this.buf = new XByteBuffer(4096,false);
    this.leader = leader;
    this.source = source;
    this.view = view;
    this.id = id;
    this.type = type;
    this.write();
}
 

private CoordinationMessage createElectionMsg(Member local, Member[] others, Member leader) {
    Membership m = new Membership(local,AbsoluteOrder.comp,true);
    Arrays.fill(m,others);
    Member[] mbrs = m.getMembers();
    m.reset();
    CoordinationMessage msg = new CoordinationMessage(leader, local, mbrs,new UniqueId(UUIDGenerator.randomUUID(true)), COORD_REQUEST);
    return msg;
}
 

public void parse() {
    //header
    int offset = 16;
    //leader
    int ldrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] ldr = new byte[ldrLen];
    System.arraycopy(buf.getBytesDirect(),offset,ldr,0,ldrLen);
    leader = MemberImpl.getMember(ldr);
    offset += ldrLen;
    //source
    int srcLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    byte[] src = new byte[srcLen];
    System.arraycopy(buf.getBytesDirect(),offset,src,0,srcLen);
    source = MemberImpl.getMember(src);
    offset += srcLen;
    //view
    int mbrCount = XByteBuffer.toInt(buf.getBytesDirect(),offset);
    offset += 4;
    view = new MemberImpl[mbrCount];
    for (int i=0; i<view.length; i++ ) {
        int mbrLen = XByteBuffer.toInt(buf.getBytesDirect(),offset);
        offset += 4;
        byte[] mbr = new byte[mbrLen];
        System.arraycopy(buf.getBytesDirect(), offset, mbr, 0, mbrLen);
        view[i] = MemberImpl.getMember(mbr);
        offset += mbrLen;
    }
    //id
    this.id = new UniqueId(buf.getBytesDirect(),offset,16);
    offset += 16;
    type = new byte[16];
    System.arraycopy(buf.getBytesDirect(), offset, type, 0, type.length);
    offset += 16;
    
}
 

@Override
public void messageReceived(ChannelMessage msg) {
    if ( Logs.MESSAGES.isTraceEnabled() ) {
        Logs.MESSAGES.trace("ChannelCoordinator - Received msg:" +
                new UniqueId(msg.getUniqueId()) + " at " +
                new java.sql.Timestamp(System.currentTimeMillis()) + " from " +
                msg.getAddress().getName());
    }
    super.messageReceived(msg);
}
 

public static UniqueId getUniqudId(byte[] data) {
    return new UniqueId(data);
}
 

public UniqueId getViewId() {
    return viewId;
}
 

/**
 *
 * @param destination Member[] - destination.length > 0
 * @param msg Serializable - the message to send
 * @param options int - sender options, options can trigger guarantee levels and different interceptors to
 * react to the message see class documentation for the <code>Channel</code> object.<br>
 * @param handler - callback object for error handling and completion notification, used when a message is
 * sent asynchronously using the <code>Channel.SEND_OPTIONS_ASYNCHRONOUS</code> flag enabled.
 * @return UniqueId - the unique Id that was assigned to this message
 * @throws ChannelException - if an error occurs processing the message
 * @see org.apache.catalina.tribes.Channel
 */
@Override
public UniqueId send(Member[] destination, Serializable msg, int options, ErrorHandler handler) throws ChannelException {
    if ( msg == null ) throw new ChannelException("Cant send a NULL message");
    XByteBuffer buffer = null;
    try {
        if ( destination == null || destination.length == 0) throw new ChannelException("No destination given");
        ChannelData data = new ChannelData(true);//generates a unique Id
        data.setAddress(getLocalMember(false));
        data.setTimestamp(System.currentTimeMillis());
        byte[] b = null;
        if ( msg instanceof ByteMessage ){
            b = ((ByteMessage)msg).getMessage();
            options = options | SEND_OPTIONS_BYTE_MESSAGE;
        } else {
            b = XByteBuffer.serialize(msg);
            options = options & (~SEND_OPTIONS_BYTE_MESSAGE);
        }
        data.setOptions(options);
        //XByteBuffer buffer = new XByteBuffer(b.length+128,false);
        buffer = BufferPool.getBufferPool().getBuffer(b.length+128, false);
        buffer.append(b,0,b.length);
        data.setMessage(buffer);
        InterceptorPayload payload = null;
        if ( handler != null ) {
            payload = new InterceptorPayload();
            payload.setErrorHandler(handler);
        }
        getFirstInterceptor().sendMessage(destination, data, payload);
        if ( Logs.MESSAGES.isTraceEnabled() ) {
            Logs.MESSAGES.trace("GroupChannel - Sent msg:" + new UniqueId(data.getUniqueId()) + " at " +new java.sql.Timestamp(System.currentTimeMillis())+ " to "+Arrays.toNameString(destination));
            Logs.MESSAGES.trace("GroupChannel - Send Message:" + new UniqueId(data.getUniqueId()) + " is " +msg);
        }

        return new UniqueId(data.getUniqueId());
    }catch ( Exception x ) {
        if ( x instanceof ChannelException ) throw (ChannelException)x;
        throw new ChannelException(x);
    } finally {
        if ( buffer != null ) BufferPool.getBufferPool().returnBuffer(buffer);
    }
}
 

protected void viewChange(UniqueId viewId, Member[] view) {
    //invoke any listeners
}
 

public UniqueId getViewId() {
    return viewId;
}
 

public UniqueId getId() {
    if ( id == null ) parse();
    return id;
}
 

public MapEntry(ChannelMessage msg, UniqueId id, long timestamp) {
    this.msg = msg;
    this.id = id;
    this.timestamp = timestamp;
}
 

public static UniqueId getUniqudId(ChannelMessage msg) {
    return new UniqueId(msg.getUniqueId());
}
 

public static UniqueId getUniqudId(byte[] data) {
    return new UniqueId(data);
}
 

public static UniqueId getUniqudId(ChannelMessage msg) {
    return new UniqueId(msg.getUniqueId());
}
 

public MapEntry(ChannelMessage msg, UniqueId id, long timestamp) {
    this.msg = msg;
    this.id = id;
    this.timestamp = timestamp;
}
 

public UniqueId getId() {
    if ( id == null ) parse();
    return id;
}