org.infinispan.statetransfer.StateTransferManager Maven / Gradle / Ivy

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 * Copyright 2011 Red Hat Inc. and/or its affiliates and other
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 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
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 *
 * This software is distributed in the hope that it will be useful,
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 * Lesser General Public License for more details.
 *
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package org.infinispan.statetransfer;

import org.infinispan.commands.TopologyAffectedCommand;
import org.infinispan.factories.scopes.Scope;
import org.infinispan.factories.scopes.Scopes;
import org.infinispan.jmx.annotations.DataType;
import org.infinispan.jmx.annotations.ManagedAttribute;
import org.infinispan.remoting.transport.Address;
import org.infinispan.topology.CacheTopology;

import java.util.Set;

/**
 * A component that manages the state transfer when the topology of the cluster changes.
 *
 * @author Dan Berindei 
 * @author Mircea Markus
 * @author [email protected]
 * @since 5.1
 */
@Scope(Scopes.NAMED_CACHE)
public interface StateTransferManager {

   //todo [anistor] this is inaccurate. this node does not hold state yet in current implementation
   @ManagedAttribute(description = "If true, the node has successfully joined the grid and is considered to hold state.  If false, the join process is still in progress.", displayName = "Is join completed?", dataType = DataType.TRAIT)
   boolean isJoinComplete();

   /**
    * Checks if an inbound state transfer is in progress.
    */
   @ManagedAttribute(description = "Checks whether there is a pending inbound state transfer on this cluster member.", displayName = "Is state transfer in progress?", dataType = DataType.TRAIT)
   boolean isStateTransferInProgress();

   /**
    * Checks if an inbound state transfer is in progress for a given key.
    *
    * @param key
    * @return
    */
   boolean isStateTransferInProgressForKey(Object key);

   CacheTopology getCacheTopology();

   void start() throws Exception;

   void stop();

   /**
    * If there is an state transfer happening at the moment, this method forwards the supplied
    * command to the nodes that are new owners of the data, in order to assure consistency.
    */
   void forwardCommandIfNeeded(TopologyAffectedCommand command, Set