rename to replication

Signed-off-by: Poojita Raj <[email protected]>

server/src/main/java/org/opensearch/indices/cluster/IndicesClusterStateService.java

@@ -80,7 +80,7 @@
 import org.opensearch.indices.recovery.PeerRecoveryTargetService;
 import org.opensearch.indices.recovery.RecoveryListener;
 import org.opensearch.indices.recovery.RecoveryState;
-import org.opensearch.indices.replication.common.ShardTargetState;
+import org.opensearch.indices.replication.common.ReplicationState;
 import org.opensearch.repositories.RepositoriesService;
 import org.opensearch.search.SearchService;
 import org.opensearch.snapshots.SnapshotShardsService;
@@ -745,7 +745,7 @@ public synchronized void handleRecoveryFailure(ShardRouting shardRouting, boolea
         failAndRemoveShard(shardRouting, sendShardFailure, "failed recovery", failure, clusterService.state());
     }
 
-    public void handleRecoveryDone(ShardTargetState state, ShardRouting shardRouting, long primaryTerm) {
+    public void handleRecoveryDone(ReplicationState state, ShardRouting shardRouting, long primaryTerm) {
         RecoveryState RecState = (RecoveryState) state;
         shardStateAction.shardStarted(shardRouting, primaryTerm, "after " + RecState.getRecoverySource(), SHARD_STATE_ACTION_LISTENER);
     }

server/src/main/java/org/opensearch/indices/recovery/PeerRecoveryTargetService.java

@@ -69,8 +69,8 @@
 import org.opensearch.index.store.Store;
 import org.opensearch.index.translog.Translog;
 import org.opensearch.index.translog.TranslogCorruptedException;
-import org.opensearch.indices.replication.common.ShardTargetCollection;
-import org.opensearch.indices.replication.common.ShardTargetCollection.ShardTargetRef;
+import org.opensearch.indices.replication.common.ReplicationCollection;
+import org.opensearch.indices.replication.common.ReplicationCollection.ReplicationRef;
 import org.opensearch.indices.replication.common.ReplicationLuceneIndex;
 import org.opensearch.indices.replication.common.ReplicationTimer;
 import org.opensearch.tasks.Task;
@@ -125,7 +125,7 @@ public static class Actions {
     private final RecoverySettings recoverySettings;
     private final ClusterService clusterService;
 
-    private final ShardTargetCollection<RecoveryTarget> onGoingRecoveries;
+    private final ReplicationCollection<RecoveryTarget> onGoingRecoveries;
 
     public PeerRecoveryTargetService(
         ThreadPool threadPool,
@@ -137,7 +137,7 @@ public PeerRecoveryTargetService(
         this.transportService = transportService;
         this.recoverySettings = recoverySettings;
         this.clusterService = clusterService;
-        this.onGoingRecoveries = new ShardTargetCollection<>(logger, threadPool);
+        this.onGoingRecoveries = new ReplicationCollection<>(logger, threadPool);
 
         transportService.registerRequestHandler(
             Actions.FILES_INFO,
@@ -229,7 +229,7 @@ private void doRecovery(final long recoveryId, final StartRecoveryRequest preExi
         final TransportRequest requestToSend;
         final StartRecoveryRequest startRequest;
         final ReplicationTimer timer;
-        try (ShardTargetCollection.ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.get(recoveryId)) {
+        try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.get(recoveryId)) {
             if (recoveryRef == null) {
                 logger.trace("not running recovery with id [{}] - can not find it (probably finished)", recoveryId);
                 return;
@@ -353,7 +353,7 @@ class PrepareForTranslogOperationsRequestHandler implements TransportRequestHand
 
         @Override
         public void messageReceived(RecoveryPrepareForTranslogOperationsRequest request, TransportChannel channel, Task task) {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final ActionListener<Void> listener = createOrFinishListener(recoveryRef, channel, Actions.PREPARE_TRANSLOG, request);
                 if (listener == null) {
                     return;
@@ -368,7 +368,7 @@ class FinalizeRecoveryRequestHandler implements TransportRequestHandler<Recovery
 
         @Override
         public void messageReceived(RecoveryFinalizeRecoveryRequest request, TransportChannel channel, Task task) throws Exception {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final ActionListener<Void> listener = createOrFinishListener(recoveryRef, channel, Actions.FINALIZE, request);
                 if (listener == null) {
                     return;
@@ -384,7 +384,7 @@ class HandoffPrimaryContextRequestHandler implements TransportRequestHandler<Rec
         @Override
         public void messageReceived(final RecoveryHandoffPrimaryContextRequest request, final TransportChannel channel, Task task)
             throws Exception {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 recoveryRef.get().handoffPrimaryContext(request.primaryContext());
             }
             channel.sendResponse(TransportResponse.Empty.INSTANCE);
@@ -397,7 +397,7 @@ class TranslogOperationsRequestHandler implements TransportRequestHandler<Recove
         @Override
         public void messageReceived(final RecoveryTranslogOperationsRequest request, final TransportChannel channel, Task task)
             throws IOException {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final RecoveryTarget recoveryTarget = recoveryRef.get();
                 final ActionListener<Void> listener = createOrFinishListener(
                     recoveryRef,
@@ -417,7 +417,7 @@ public void messageReceived(final RecoveryTranslogOperationsRequest request, fin
         private void performTranslogOps(
             final RecoveryTranslogOperationsRequest request,
             final ActionListener<Void> listener,
-            final ShardTargetRef<RecoveryTarget> recoveryRef
+            final ReplicationRef<RecoveryTarget> recoveryRef
         ) {
             final RecoveryTarget recoveryTarget = recoveryRef.get();
 
@@ -433,7 +433,7 @@ private void performTranslogOps(
                     public void onNewClusterState(ClusterState state) {
                         threadPool.generic().execute(ActionRunnable.wrap(listener, l -> {
                             try (
-                                ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(
+                                ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(
                                     request.recoveryId(),
                                     request.shardId()
                                 )
@@ -483,7 +483,7 @@ class FilesInfoRequestHandler implements TransportRequestHandler<RecoveryFilesIn
 
         @Override
         public void messageReceived(RecoveryFilesInfoRequest request, TransportChannel channel, Task task) throws Exception {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final ActionListener<Void> listener = createOrFinishListener(recoveryRef, channel, Actions.FILES_INFO, request);
                 if (listener == null) {
                     return;
@@ -506,7 +506,7 @@ class CleanFilesRequestHandler implements TransportRequestHandler<RecoveryCleanF
 
         @Override
         public void messageReceived(RecoveryCleanFilesRequest request, TransportChannel channel, Task task) throws Exception {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final ActionListener<Void> listener = createOrFinishListener(recoveryRef, channel, Actions.CLEAN_FILES, request);
                 if (listener == null) {
                     return;
@@ -525,7 +525,7 @@ class FileChunkTransportRequestHandler implements TransportRequestHandler<Recove
 
         @Override
         public void messageReceived(final RecoveryFileChunkRequest request, TransportChannel channel, Task task) throws Exception {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.getSafe(request.recoveryId(), request.shardId())) {
                 final RecoveryTarget recoveryTarget = recoveryRef.get();
                 final ActionListener<Void> listener = createOrFinishListener(recoveryRef, channel, Actions.FILE_CHUNK, request);
                 if (listener == null) {
@@ -561,7 +561,7 @@ public void messageReceived(final RecoveryFileChunkRequest request, TransportCha
     }
 
     private ActionListener<Void> createOrFinishListener(
-        final ShardTargetRef<RecoveryTarget> recoveryRef,
+        final ReplicationRef<RecoveryTarget> recoveryRef,
         final TransportChannel channel,
         final String action,
         final RecoveryTransportRequest request
@@ -570,7 +570,7 @@ private ActionListener<Void> createOrFinishListener(
     }
 
     private ActionListener<Void> createOrFinishListener(
-        final ShardTargetRef<RecoveryTarget> recoveryRef,
+        final ReplicationRef<RecoveryTarget> recoveryRef,
         final TransportChannel channel,
         final String action,
         final RecoveryTransportRequest request,
@@ -607,7 +607,7 @@ class RecoveryRunner extends AbstractRunnable {
 
         @Override
         public void onFailure(Exception e) {
-            try (ShardTargetRef<RecoveryTarget> recoveryRef = onGoingRecoveries.get(recoveryId)) {
+            try (ReplicationRef<RecoveryTarget> recoveryRef = onGoingRecoveries.get(recoveryId)) {
                 if (recoveryRef != null) {
                     logger.error(() -> new ParameterizedMessage("unexpected error during recovery [{}], failing shard", recoveryId), e);
                     onGoingRecoveries.fail(

server/src/main/java/org/opensearch/indices/recovery/RecoveryListener.java

@@ -11,15 +11,15 @@
 import org.opensearch.OpenSearchException;
 import org.opensearch.cluster.routing.ShardRouting;
 import org.opensearch.indices.cluster.IndicesClusterStateService;
-import org.opensearch.indices.replication.common.ShardTargetListener;
-import org.opensearch.indices.replication.common.ShardTargetState;
+import org.opensearch.indices.replication.common.ReplicationListener;
+import org.opensearch.indices.replication.common.ReplicationState;
 
 /**
  * Listener that runs on changes in Recovery state
  *
  * @opensearch.internal
  */
-public class RecoveryListener implements ShardTargetListener {
+public class RecoveryListener implements ReplicationListener {
 
     /**
      * ShardRouting with which the shard was created
@@ -44,12 +44,12 @@ public RecoveryListener(
     }
 
     @Override
-    public void onDone(ShardTargetState state) {
+    public void onDone(ReplicationState state) {
         indicesClusterStateService.handleRecoveryDone(state, shardRouting, primaryTerm);
     }
 
     @Override
-    public void onFailure(ShardTargetState state, OpenSearchException e, boolean sendShardFailure) {
+    public void onFailure(ReplicationState state, OpenSearchException e, boolean sendShardFailure) {
         indicesClusterStateService.handleRecoveryFailure(shardRouting, sendShardFailure, e);
     }
 }

server/src/main/java/org/opensearch/indices/recovery/RecoveryState.java

@@ -45,7 +45,7 @@
 import org.opensearch.common.xcontent.XContentBuilder;
 import org.opensearch.index.shard.IndexShard;
 import org.opensearch.index.shard.ShardId;
-import org.opensearch.indices.replication.common.ShardTargetState;
+import org.opensearch.indices.replication.common.ReplicationState;
 import org.opensearch.indices.replication.common.ReplicationLuceneIndex;
 import org.opensearch.indices.replication.common.ReplicationTimer;
 
@@ -57,7 +57,7 @@
  *
  * @opensearch.internal
  */
-public class RecoveryState implements ShardTargetState, ToXContentFragment, Writeable {
+public class RecoveryState implements ReplicationState, ToXContentFragment, Writeable {
 
     /**
      * The stage of the recovery state

server/src/main/java/org/opensearch/indices/recovery/RecoveryTarget.java

@@ -56,9 +56,9 @@
 import org.opensearch.index.store.StoreFileMetadata;
 import org.opensearch.index.translog.Translog;
 import org.opensearch.indices.replication.common.ReplicationLuceneIndex;
-import org.opensearch.indices.replication.common.ShardTarget;
-import org.opensearch.indices.replication.common.ShardTargetListener;
-import org.opensearch.indices.replication.common.ShardTargetCollection;
+import org.opensearch.indices.replication.common.ReplicationTarget;
+import org.opensearch.indices.replication.common.ReplicationListener;
+import org.opensearch.indices.replication.common.ReplicationCollection;
 
 import java.io.IOException;
 import java.nio.file.Path;
@@ -67,11 +67,11 @@
 
 /**
  * Represents a recovery where the current node is the target node of the recovery. To track recoveries in a central place, instances of
- * this class are created through {@link ShardTargetCollection}.
+ * this class are created through {@link ReplicationCollection}.
  *
  * @opensearch.internal
  */
-public class RecoveryTarget extends ShardTarget implements RecoveryTargetHandler {
+public class RecoveryTarget extends ReplicationTarget implements RecoveryTargetHandler {
 
     private static final String RECOVERY_PREFIX = "recovery.";
 
@@ -90,7 +90,7 @@ public class RecoveryTarget extends ShardTarget implements RecoveryTargetHandler
      * @param sourceNode                        source node of the recovery where we recover from
      * @param listener                          called when recovery is completed/failed
      */
-    public RecoveryTarget(IndexShard indexShard, DiscoveryNode sourceNode, ShardTargetListener listener) {
+    public RecoveryTarget(IndexShard indexShard, DiscoveryNode sourceNode, ReplicationListener listener) {
         super("recovery_status", indexShard, indexShard.recoveryState().getIndex(), listener);
         this.cancellableThreads = new CancellableThreads();
         this.sourceNode = sourceNode;

server/src/main/java/org/opensearch/indices/replication/common/ShardTargetCollection.java → server/src/main/java/org/opensearch/indices/replication/common/ReplicationCollection.java

@@ -51,22 +51,22 @@
 import java.util.concurrent.ConcurrentMap;
 
 /**
- * This class holds a collection of all on going events on the current node (i.e., the node is the target node
- * of those events). The class is used to guarantee concurrent semantics such that once a recoveries was done/cancelled/failed
- * no other thread will be able to find it. Last, the {@link ShardTargetRef} inner class verifies that recovery temporary files
+ * This class holds a collection of all on going replication events on the current node (i.e., the node is the target node
+ * of those events). The class is used to guarantee concurrent semantics such that once an event was done/cancelled/failed
+ * no other thread will be able to find it. Last, the {@link ReplicationRef} inner class verifies that temporary files
  * and store will only be cleared once on going usage is finished.
  *
  * @opensearch.internal
  */
-public class ShardTargetCollection<T extends ShardTarget> {
+public class ReplicationCollection<T extends ReplicationTarget> {
 
     /** This is the single source of truth for ongoing target events. If it's not here, it was canceled or done */
     private final ConcurrentMap<Long, T> onGoingTargetEvents = ConcurrentCollections.newConcurrentMap();
 
     private final Logger logger;
     private final ThreadPool threadPool;
 
-    public ShardTargetCollection(Logger logger, ThreadPool threadPool) {
+    public ReplicationCollection(Logger logger, ThreadPool threadPool) {
         this.logger = logger;
         this.threadPool = threadPool;
     }
@@ -86,7 +86,7 @@ private void startInternal(T target, TimeValue activityTimeout) {
         assert existingTarget == null : "found two Target instances with the same id";
         logger.trace("started {}", target.description());
         threadPool.schedule(
-            new ShardTargetMonitor(target.getId(), target.lastAccessTime(), activityTimeout),
+            new ReplicationMonitor(target.getId(), target.lastAccessTime(), activityTimeout),
             activityTimeout,
             ThreadPool.Names.GENERIC
         );
@@ -143,23 +143,23 @@ public T getTarget(long id) {
     }
 
     /**
-     * gets the {@link ShardTarget } for a given id. The ShardTarget returned has it's ref count already incremented
-     * to make sure it's safe to use. However, you must call {@link ShardTarget#decRef()} when you are done with it, typically
+     * gets the {@link ReplicationTarget } for a given id. The ShardTarget returned has it's ref count already incremented
+     * to make sure it's safe to use. However, you must call {@link ReplicationTarget#decRef()} when you are done with it, typically
      * by using this method in a try-with-resources clause.
      * <p>
      * Returns null if recovery is not found
      */
-    public ShardTargetRef<T> get(long id) {
+    public ReplicationRef<T> get(long id) {
         T status = onGoingTargetEvents.get(id);
         if (status != null && status.tryIncRef()) {
-            return new ShardTargetRef<T>(status);
+            return new ReplicationRef<T>(status);
         }
         return null;
     }
 
     /** Similar to {@link #get(long)} but throws an exception if no target is found */
-    public ShardTargetRef<T> getSafe(long id, ShardId shardId) {
-        ShardTargetRef<T> ref = get(id);
+    public ReplicationRef<T> getSafe(long id, ShardId shardId) {
+        ReplicationRef<T> ref = get(id);
         if (ref == null) {
             throw new IndexShardClosedException(shardId);
         }
@@ -236,31 +236,31 @@ public boolean cancelForShard(ShardId shardId, String reason) {
     }
 
     /**
-     * a reference to {@link ShardTarget}, which implements {@link AutoCloseable}. closing the reference
-     * causes {@link ShardTarget#decRef()} to be called. This makes sure that the underlying resources
-     * will not be freed until {@link ShardTargetRef#close()} is called.
+     * a reference to {@link ReplicationTarget}, which implements {@link AutoCloseable}. closing the reference
+     * causes {@link ReplicationTarget#decRef()} to be called. This makes sure that the underlying resources
+     * will not be freed until {@link ReplicationRef#close()} is called.
      *
      * @opensearch.internal
      */
-    public static class ShardTargetRef<T extends ShardTarget> extends AutoCloseableRefCounted<T> {
+    public static class ReplicationRef<T extends ReplicationTarget> extends AutoCloseableRefCounted<T> {
 
         /**
-         * Important: {@link ShardTarget#tryIncRef()} should
+         * Important: {@link ReplicationTarget#tryIncRef()} should
          * be *successfully* called on status before
          */
-        public ShardTargetRef(T status) {
+        public ReplicationRef(T status) {
             super(status);
             status.setLastAccessTime();
         }
     }
 
-    private class ShardTargetMonitor extends AbstractRunnable {
+    private class ReplicationMonitor extends AbstractRunnable {
         private final long id;
         private final TimeValue checkInterval;
 
         private volatile long lastSeenAccessTime;
 
-        private ShardTargetMonitor(long id, long lastSeenAccessTime, TimeValue checkInterval) {
+        private ReplicationMonitor(long id, long lastSeenAccessTime, TimeValue checkInterval) {
             this.id = id;
             this.checkInterval = checkInterval;
             this.lastSeenAccessTime = lastSeenAccessTime;