Examples of org.apache.kahadb.journal.Location

org.apache.kahadb.journal.Location
Used as a location in the data store.

            if (loaded.get()) {
                this.store.getPageFile().tx().execute(new Transaction.Closure<IOException>() {
                    public void execute(Transaction tx) throws IOException {
                        Iterator<Map.Entry<String,Location>> iterator = iterator(tx);
                        while (iterator.hasNext()) {
                            Location location = iterator.next().getValue();
                            candidates.remove(location.getDataFileId());
                        }
                    }
                });
            }
        }

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        LOG.info("Stopped KahaDB");
        super.doStop(stopper);
    }


    void incrementRedeliveryAndReWrite(final String key, final KahaDestination destination) throws IOException {
        Location location;
        this.indexLock.writeLock().lock();
        try {
              location = findMessageLocation(key, destination);
        } finally {
            this.indexLock.writeLock().unlock();
        }


        if (location != null) {
            KahaAddMessageCommand addMessage = (KahaAddMessageCommand) load(location);
            Message message = (Message) wireFormat.unmarshal(new DataInputStream(addMessage.getMessage().newInput()));


            message.incrementRedeliveryCounter();
            if (LOG.isTraceEnabled()) {
                LOG.trace("rewriting: " + key + " with deliveryCount: " + message.getRedeliveryCounter());
            }
            org.apache.activemq.util.ByteSequence packet = wireFormat.marshal(message);
            addMessage.setMessage(new Buffer(packet.getData(), packet.getOffset(), packet.getLength()));


            final Location rewriteLocation = journal.write(toByteSequence(addMessage), true);


            this.indexLock.writeLock().lock();
            try {
                pageFile.tx().execute(new Transaction.Closure<IOException>() {
                    public void execute(Transaction tx) throws IOException {

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            final String key = identity.toString();


            // Hopefully one day the page file supports concurrent read
            // operations... but for now we must
            // externally synchronize...
            Location location;
            indexLock.writeLock().lock();
            try {
                location = findMessageLocation(key, dest);
            }finally {
                indexLock.writeLock().unlock();

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public class LocationMarshaller implements Marshaller<Location> {
    public final static LocationMarshaller INSTANCE = new LocationMarshaller();


    public Location readPayload(DataInput dataIn) throws IOException {
        Location rc = new Location();
        rc.setDataFileId(dataIn.readInt());
        rc.setOffset(dataIn.readInt());
        return rc;
    }

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    public int getFixedSize() {
        return 8;
    }


    public Location deepCopy(Location source) {
        return new Location(source);
    }

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    public void readExternal(DataInput in) throws IOException {
        this.id = in.readUTF();
        this.prev = in.readLong();
        this.next = in.readLong();
        if (this.location == null) {
            this.location = new Location();
        }
        this.location.readExternal(in);
    }

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    public void writeExternal(DataOutput out) throws IOException {
        out.writeUTF(this.id);
        out.writeLong(this.prev);
        out.writeLong(this.next);
        if (this.location == null) {
            this.location = new Location();
        }
        this.location.writeExternal(out);
    }

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            this.size=0;
        }
    }


    synchronized public void addLast(final String id, final ByteSequence bs) throws IOException {
        final Location location = this.store.write(bs, false);
        synchronized (indexLock) {
            this.store.getPageFile().tx().execute(new Transaction.Closure<IOException>() {
                public void execute(Transaction tx) throws IOException {
                    addLast(tx, id, bs, location);
                }

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        this.lastId = entry.getPage().getPageId();
        this.size++;
    }


    synchronized public void addFirst(final String id, final ByteSequence bs) throws IOException {
        final Location location = this.store.write(bs, false);
        synchronized (indexLock) {
            this.store.getPageFile().tx().execute(new Transaction.Closure<IOException>() {
                public void execute(Transaction tx) throws IOException {
                    addFirst(tx, id, bs, location);
                }

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            final String key = identity.toString();


            // Hopefully one day the page file supports concurrent read
            // operations... but for now we must
            // externally synchronize...
            Location location;
            indexLock.readLock().lock();
            try {
                location = pageFile.tx().execute(new Transaction.CallableClosure<Location, IOException>() {
                    public Location execute(Transaction tx) throws IOException {
                        StoredDestination sd = getStoredDestination(dest, tx);

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Related Classes of org.apache.kahadb.journal.Location

org.apache.activemq.broker.scheduler.JobLocation

org.apache.activemq.broker.scheduler.JobSchedulerImpl

org.apache.activemq.store.kahadb.KahaDBStore

org.apache.activemq.store.kahadb.KahaDBStore$KahaDBMessageStore

org.apache.activemq.store.kahadb.MessageDatabase

org.apache.activemq.store.kahadb.MessageDatabase$LocationMarshaller

org.apache.activemq.store.kahadb.MultiKahaDBTransactionStore

org.apache.activemq.store.kahadb.plist.EntryLocation

org.apache.activemq.store.kahadb.plist.PList

org.apache.kahadb.util.LocationMarshaller

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