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199 changes: 199 additions & 0 deletions
199
...ugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/action/GlobalCheckpointPollAction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| package org.elasticsearch.xpack.ccr.action; | ||
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| import org.elasticsearch.action.Action; | ||
| import org.elasticsearch.action.ActionListener; | ||
| import org.elasticsearch.action.ActionRequestValidationException; | ||
| import org.elasticsearch.action.ActionResponse; | ||
| import org.elasticsearch.action.support.ActionFilters; | ||
| import org.elasticsearch.action.support.single.shard.SingleShardRequest; | ||
| import org.elasticsearch.action.support.single.shard.TransportSingleShardAction; | ||
| import org.elasticsearch.cluster.ClusterState; | ||
| import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver; | ||
| import org.elasticsearch.cluster.routing.ShardsIterator; | ||
| import org.elasticsearch.cluster.service.ClusterService; | ||
| import org.elasticsearch.common.inject.Inject; | ||
| import org.elasticsearch.common.io.stream.StreamInput; | ||
| import org.elasticsearch.common.io.stream.StreamOutput; | ||
| import org.elasticsearch.common.settings.Settings; | ||
| import org.elasticsearch.index.IndexService; | ||
| import org.elasticsearch.index.shard.IndexShard; | ||
| import org.elasticsearch.index.shard.ShardId; | ||
| import org.elasticsearch.indices.IndicesService; | ||
| import org.elasticsearch.threadpool.ThreadPool; | ||
| import org.elasticsearch.transport.TransportService; | ||
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| import java.io.IOException; | ||
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| import static org.elasticsearch.action.ValidateActions.addValidationError; | ||
| import static org.elasticsearch.index.seqno.SequenceNumbers.NO_OPS_PERFORMED; | ||
| import static org.elasticsearch.index.seqno.SequenceNumbers.UNASSIGNED_SEQ_NO; | ||
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| public class GlobalCheckpointPollAction extends Action<GlobalCheckpointPollAction.Response> { | ||
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| public static final GlobalCheckpointPollAction INSTANCE = new GlobalCheckpointPollAction(); | ||
| public static final String NAME = "indices:data/read/xpack/ccr/global_checkpoint_poll"; | ||
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| protected GlobalCheckpointPollAction() { | ||
| super(NAME); | ||
| } | ||
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| public static class Request extends SingleShardRequest<Request> { | ||
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| private long globalCheckpoint = UNASSIGNED_SEQ_NO; | ||
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| public long getGlobalCheckpoint() { | ||
| return globalCheckpoint; | ||
| } | ||
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| public void setGlobalCheckpoint(long globalCheckpoint) { | ||
| this.globalCheckpoint = globalCheckpoint; | ||
| } | ||
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| private ShardId shardId; | ||
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| public ShardId getShardId() { | ||
| return shardId; | ||
| } | ||
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| public Request() { | ||
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| } | ||
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| public Request(final ShardId shardId) { | ||
| super(shardId.getIndexName()); | ||
| this.shardId = shardId; | ||
| } | ||
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| @Override | ||
| public ActionRequestValidationException validate() { | ||
| ActionRequestValidationException e = null; | ||
| if (globalCheckpoint < NO_OPS_PERFORMED) { | ||
| e = addValidationError("global checkpoint [" + globalCheckpoint + "] must be at least -1", e); | ||
| } | ||
| if (shardId == null) { | ||
| e = addValidationError("shard ID must be non-null", e); | ||
| } | ||
| return e; | ||
| } | ||
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| @Override | ||
| public void readFrom(final StreamInput in) throws IOException { | ||
| super.readFrom(in); | ||
| globalCheckpoint = in.readZLong(); | ||
| shardId = ShardId.readShardId(in); | ||
| } | ||
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| super.writeTo(out); | ||
| out.writeZLong(globalCheckpoint); | ||
| shardId.writeTo(out); | ||
| } | ||
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| } | ||
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| public static class Response extends ActionResponse { | ||
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| private long globalCheckpoint; | ||
|
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| public long getGlobalCheckpoint() { | ||
| return globalCheckpoint; | ||
| } | ||
|
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| public Response() { | ||
|
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| } | ||
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| public Response(final long globalCheckpoint) { | ||
| this.globalCheckpoint = globalCheckpoint; | ||
| } | ||
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| @Override | ||
| public void readFrom(StreamInput in) throws IOException { | ||
| super.readFrom(in); | ||
| globalCheckpoint = in.readZLong(); | ||
| } | ||
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| super.writeTo(out); | ||
| out.writeZLong(globalCheckpoint); | ||
| } | ||
|
|
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| } | ||
|
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| @Override | ||
| public Response newResponse() { | ||
| return new Response(); | ||
| } | ||
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| public static class TransportGlobalCheckpointPollAction extends TransportSingleShardAction<Request, Response> { | ||
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| private final IndicesService indicesService; | ||
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| @Inject | ||
| public TransportGlobalCheckpointPollAction( | ||
| final Settings settings, | ||
| final ThreadPool threadPool, | ||
| final ClusterService clusterService, | ||
| final TransportService transportService, | ||
| final ActionFilters actionFilters, | ||
| final IndexNameExpressionResolver indexNameExpressionResolver, | ||
| final IndicesService indicesService) { | ||
| super( | ||
| settings, | ||
| NAME, | ||
| threadPool, | ||
| clusterService, | ||
| transportService, | ||
| actionFilters, | ||
| indexNameExpressionResolver, | ||
| Request::new, | ||
| ThreadPool.Names.MANAGEMENT); | ||
| this.indicesService = indicesService; | ||
| } | ||
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| @Override | ||
| protected void asyncShardOperation( | ||
| final Request request, final ShardId shardId, final ActionListener<Response> listener) throws IOException { | ||
| final IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex()); | ||
| final IndexShard indexShard = indexService.getShard(shardId.id()); | ||
| indexShard.addGlobalCheckpointListener( | ||
| request.getGlobalCheckpoint(), | ||
| (g, e) -> { | ||
| if (g != UNASSIGNED_SEQ_NO) { | ||
| assert g >= NO_OPS_PERFORMED && e == null; | ||
| listener.onResponse(new Response(g)); | ||
| } else { | ||
| assert e != null; | ||
| listener.onFailure(e); | ||
| } | ||
| }); | ||
| } | ||
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| @Override | ||
| protected Response shardOperation(final Request request, final ShardId shardId) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| protected Response newResponse() { | ||
| return new Response(); | ||
| } | ||
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| @Override | ||
| protected boolean resolveIndex(final Request request) { | ||
| return false; | ||
| } | ||
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| @Override | ||
| protected ShardsIterator shards(final ClusterState state, final InternalRequest request) { | ||
| return state | ||
| .routingTable() | ||
| .shardRoutingTable(request.concreteIndex(), request.request().getShardId().id()) | ||
| .activeInitializingShardsRandomIt(); | ||
| } | ||
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| } | ||
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| } |
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