Examples of org.apache.catalina.tribes.tipis.ReplicatedMapEntry

Package org.apache.catalina.tribes.tipis

Examples of org.apache.catalina.tribes.tipis.ReplicatedMapEntry

org.apache.catalina.tribes.tipis.ReplicatedMapEntry
For smarter replication, an object can implement this interface to replicate diffs
The replication logic will call the methods in the following order:
1. if ( entry.isDirty() ) try { 2. entry.lock(); 3. byte[] diff = entry.getDiff(); 4. entry.reset(); } finally { 5. entry.unlock(); } }

When the data is deserialized the logic is called in the following order
1. ReplicatedMapEntry entry = (ReplicatedMapEntry)objectIn.readObject(); 2. if ( isBackup(entry)||isPrimary(entry) ) entry.setOwner(owner);
@author Filip Hanik @version 1.0

            }
            //check to see if the message is diffable
            boolean diff = ((value instanceof ReplicatedMapEntry) && ((ReplicatedMapEntry)value).isDiffable());
            MapMessage msg = null;
            if (diff) {
                ReplicatedMapEntry rentry = (ReplicatedMapEntry)entry.getValue();
                try {
                    rentry.lock();
                    //construct a diff message
                    msg =
                        new MapMessage(mapContextName, MapMessage.MSG_BACKUP, true, (Serializable)entry.getKey(), null,
                                       rentry.getDiff(), entry.getPrimary(), entry.getBackupNodes());
                } catch (IOException x) {
                    log.error("Unable to diff object. Will replicate the entire object instead.", x);
                } finally {
                    rentry.unlock();
                }


            }
            if (msg == null) {
                //construct a complete

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                entry.setBackup(mapmsg.getMsgType() == MapMessage.MSG_BACKUP);
                entry.setProxy(false);
                entry.setBackupNodes(mapmsg.getBackupNodes());
                entry.setPrimary(mapmsg.getPrimary());
                if (entry.getValue() instanceof ReplicatedMapEntry) {
                    ReplicatedMapEntry diff = (ReplicatedMapEntry)entry.getValue();
                    if (mapmsg.isDiff()) {
                        try {
                            diff.lock();
                            diff.applyDiff(mapmsg.getDiffValue(), 0, mapmsg.getDiffValue().length);
                        } catch (Exception x) {
                            log.error("Unable to apply diff to key:" + entry.getKey(), x);
                        } finally {
                            diff.unlock();
                        }
                    } else {
                        if (mapmsg.getValue() != null)
                            entry.setValue(mapmsg.getValue());
                        ((ReplicatedMapEntry)entry.getValue()).setOwner(getMapOwner());
                    } //end if
                } else if (mapmsg.getValue() instanceof ReplicatedMapEntry) {
                    ReplicatedMapEntry re = (ReplicatedMapEntry)mapmsg.getValue();
                    re.setOwner(getMapOwner());
                    entry.setValue(re);
                } else {
                    if (mapmsg.getValue() != null)
                        entry.setValue(mapmsg.getValue());
                } //end if

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                    }
                    msg = (MapMessage)resp[0].getMessage();
                    msg.deserialize(getExternalLoaders());
                    backup = entry.getBackupNodes();
                    if (entry.getValue() instanceof ReplicatedMapEntry) {
                        ReplicatedMapEntry val = (ReplicatedMapEntry)entry.getValue();
                        val.setOwner(getMapOwner());
                    }
                    if (msg.getValue() != null)
                        entry.setValue(msg.getValue());
                }
                if (entry.isBackup()) {
                    //select a new backup node
                    backup = publishEntryInfo(key, entry.getValue());
                } else if (entry.isProxy()) {
                    //invalidate the previous primary
                    msg =
                        new MapMessage(getMapContextName(), MapMessage.MSG_PROXY, false, (Serializable)key, null, null,
                                       channel.getLocalMember(false), backup);
                    Member[] dest = getMapMembersExcl(backup);
                    if (dest != null && dest.length > 0) {
                        getChannel().send(dest, msg, getChannelSendOptions());
                    }
                }
                entry.setPrimary(channel.getLocalMember(false));
                entry.setBackupNodes(backup);
                entry.setBackup(false);
                entry.setProxy(false);


            } catch (Exception x) {
                log.error("Unable to replicate out data for a LazyReplicatedMap.get operation", x);
                return null;
            }
        }
        if (log.isTraceEnabled())
            log.trace("Requesting id:" + key + " result:" + entry.getValue());
        if (entry.getValue() != null && entry.getValue() instanceof ReplicatedMapEntry) {
            ReplicatedMapEntry val = (ReplicatedMapEntry)entry.getValue();
            //hack, somehow this is not being set above
            val.setOwner(getMapOwner());


        }
        return entry.getValue();
    }

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         * @throws IOException
         * @throws ClassNotFoundException
         */
        public void apply(byte[] data, int offset, int length, boolean diff) throws IOException, ClassNotFoundException {
            if (isDiffable() && diff) {
                ReplicatedMapEntry rentry = (ReplicatedMapEntry)value;
                try {
                    rentry.lock();
                    rentry.applyDiff(data, offset, length);
                } finally {
                    rentry.unlock();
                }
            } else if (length == 0) {
                value = null;
                proxy = true;
            } else {

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Related Classes of org.apache.catalina.tribes.tipis.ReplicatedMapEntry

org.apache.tuscany.sca.endpoint.tribes.AbstractReplicatedMap

org.apache.tuscany.sca.endpoint.tribes.AbstractReplicatedMap$MapEntry

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