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https://issues.apache.org/jira/browse/HDFS-17595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17889567#comment-17889567
]
ASF GitHub Bot commented on HDFS-17595:
---------------------------------------
Hexiaoqiao commented on code in PR #6983:
URL: https://github.com/apache/hadoop/pull/6983#discussion_r1800787847
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/AsyncErasureCoding.java:
##########
@@ -0,0 +1,181 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.server.federation.router;
+
+import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
+import org.apache.hadoop.hdfs.protocol.ECBlockGroupStats;
+import org.apache.hadoop.hdfs.protocol.ECTopologyVerifierResult;
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicyInfo;
+import
org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
+import
org.apache.hadoop.hdfs.server.federation.resolver.FederationNamespaceInfo;
+import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation;
+import org.apache.hadoop.hdfs.server.federation.router.async.ApplyFunction;
+import org.apache.hadoop.hdfs.server.namenode.NameNode;
+
+import java.io.IOException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static
org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.merge;
+import static
org.apache.hadoop.hdfs.server.federation.router.async.AsyncUtil.asyncApply;
+import static
org.apache.hadoop.hdfs.server.federation.router.async.AsyncUtil.asyncReturn;
+
+public class AsyncErasureCoding extends ErasureCoding {
+ /** RPC server to receive client calls. */
+ private final RouterRpcServer rpcServer;
+ /** RPC clients to connect to the Namenodes. */
+ private final RouterRpcClient rpcClient;
+ /** Interface to identify the active NN for a nameservice or blockpool ID. */
+ private final ActiveNamenodeResolver namenodeResolver;
+
+ public AsyncErasureCoding(RouterRpcServer server) {
+ super(server);
+ this.rpcServer = server;
+ this.rpcClient = this.rpcServer.getRPCClient();
+ this.namenodeResolver = this.rpcClient.getNamenodeResolver();
+ }
+
+ public ErasureCodingPolicyInfo[] getErasureCodingPolicies()
+ throws IOException {
+ rpcServer.checkOperation(NameNode.OperationCategory.READ);
+
+ RemoteMethod method = new RemoteMethod("getErasureCodingPolicies");
+ Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+
+ rpcClient.invokeConcurrent(
+ nss, method, true, false, ErasureCodingPolicyInfo[].class);
+ asyncApply(
+ (ApplyFunction<Map<FederationNamespaceInfo, ErasureCodingPolicyInfo[]>,
+ ErasureCodingPolicyInfo[]>) ret -> merge(ret,
ErasureCodingPolicyInfo.class));
+
+ return asyncReturn(ErasureCodingPolicyInfo[].class);
+ }
+
+ @Override
+ public Map<String, String> getErasureCodingCodecs() throws IOException {
+ rpcServer.checkOperation(NameNode.OperationCategory.READ);
+
+ RemoteMethod method = new RemoteMethod("getErasureCodingCodecs");
+ Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+
+ rpcClient.invokeConcurrent(
+ nss, method, true, false, Map.class);
+
+ asyncApply((ApplyFunction<Map<FederationNamespaceInfo,
+ Map<String, String>>, Map<String, String>>) retCodecs -> {
+ Map<String, String> ret = new HashMap<>();
+ Object obj = retCodecs;
+ @SuppressWarnings("unchecked")
+ Map<FederationNamespaceInfo, Map<String, String>> results =
+ (Map<FederationNamespaceInfo, Map<String, String>>)obj;
+ Collection<Map<String, String>> allCodecs = results.values();
+ for (Map<String, String> codecs : allCodecs) {
+ ret.putAll(codecs);
+ }
+ return ret;
+ });
+
+ return asyncReturn(Map.class);
+ }
+
+ @Override
+ public AddErasureCodingPolicyResponse[] addErasureCodingPolicies(
+ ErasureCodingPolicy[] policies) throws IOException {
+ rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
+
+ RemoteMethod method = new RemoteMethod("addErasureCodingPolicies",
+ new Class<?>[] {ErasureCodingPolicy[].class}, new Object[] {policies});
+ Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
+
+ rpcClient.invokeConcurrent(
+ nss, method, true, false, AddErasureCodingPolicyResponse[].class);
+
+ asyncApply(
+ (ApplyFunction<Map<FederationNamespaceInfo,
AddErasureCodingPolicyResponse[]>,
+ AddErasureCodingPolicyResponse[]>) ret -> {
+ return merge(ret, AddErasureCodingPolicyResponse.class);
+ });
+ return asyncReturn(AddErasureCodingPolicyResponse[].class);
+ }
+
+ @Override
+ public ErasureCodingPolicy getErasureCodingPolicy(String src)
+ throws IOException {
+ rpcServer.checkOperation(NameNode.OperationCategory.READ);
+
+ final List<RemoteLocation> locations =
+ rpcServer.getLocationsForPath(src, false, false);
+ RemoteMethod remoteMethod = new RemoteMethod("getErasureCodingPolicy",
+ new Class<?>[] {String.class}, new RemoteParam());
+ rpcClient.invokeSequential(
+ locations, remoteMethod, null, null);
+
+ asyncApply(ret -> {
+ return (ErasureCodingPolicy) ret;
+ });
+
+ return asyncReturn(ErasureCodingPolicy.class);
+ }
+
+
Review Comment:
extra blank line.
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/AsyncErasureCoding.java:
##########
@@ -0,0 +1,181 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hdfs.server.federation.router;
+
+import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
+import org.apache.hadoop.hdfs.protocol.ECBlockGroupStats;
+import org.apache.hadoop.hdfs.protocol.ECTopologyVerifierResult;
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
+import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicyInfo;
+import
org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
+import
org.apache.hadoop.hdfs.server.federation.resolver.FederationNamespaceInfo;
+import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation;
+import org.apache.hadoop.hdfs.server.federation.router.async.ApplyFunction;
+import org.apache.hadoop.hdfs.server.namenode.NameNode;
+
+import java.io.IOException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static
org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.merge;
+import static
org.apache.hadoop.hdfs.server.federation.router.async.AsyncUtil.asyncApply;
+import static
org.apache.hadoop.hdfs.server.federation.router.async.AsyncUtil.asyncReturn;
+
+public class AsyncErasureCoding extends ErasureCoding {
Review Comment:
Some other interface such as `removeErasureCodingPolicy` do not need to
override with async?
> [ARR] ErasureCoding supports asynchronous rpc.
> ----------------------------------------------
>
> Key: HDFS-17595
> URL: https://issues.apache.org/jira/browse/HDFS-17595
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: rbf
> Reporter: Jian Zhang
> Assignee: farmmamba
> Priority: Major
> Labels: pull-request-available
>
> *Describe*
> The main new addition is AsyncErasureCoding, which extends ErasureCoding so
> that supports asynchronous rpc.
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