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BIGTOP-4152: Add task log gRPC service to read agent logs (#14)
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26 changes: 26 additions & 0 deletions
26
bigtop-manager-agent/src/main/java/org/apache/bigtop/manager/agent/cache/Caches.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://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.bigtop.manager.agent.cache; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
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| public class Caches { | ||
| public static final List<Long> RUNNING_TASKS = new ArrayList<>(); | ||
| } |
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103 changes: 103 additions & 0 deletions
103
...r-agent/src/main/java/org/apache/bigtop/manager/agent/service/TaskLogServiceGrpcImpl.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://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.bigtop.manager.agent.service; | ||
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| import org.apache.bigtop.manager.agent.cache.Caches; | ||
| import org.apache.bigtop.manager.grpc.generated.TaskLogReply; | ||
| import org.apache.bigtop.manager.grpc.generated.TaskLogRequest; | ||
| import org.apache.bigtop.manager.grpc.generated.TaskLogServiceGrpc; | ||
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| import org.apache.commons.lang3.SystemUtils; | ||
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| import io.grpc.Status; | ||
| import io.grpc.stub.StreamObserver; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import net.devh.boot.grpc.server.service.GrpcService; | ||
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| import java.io.File; | ||
| import java.io.RandomAccessFile; | ||
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| @Slf4j | ||
| @GrpcService | ||
| public class TaskLogServiceGrpcImpl extends TaskLogServiceGrpc.TaskLogServiceImplBase { | ||
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| @Override | ||
| public void getLog(TaskLogRequest request, StreamObserver<TaskLogReply> responseObserver) { | ||
| String path = getLogFilePath(request.getTaskId()); | ||
| try (RandomAccessFile file = new RandomAccessFile(path, "r")) { | ||
| // Read from beginning | ||
| long fileLength = file.length(); | ||
| while (file.getFilePointer() < fileLength) { | ||
| String line = file.readLine(); | ||
| if (line != null) { | ||
| responseObserver.onNext( | ||
| TaskLogReply.newBuilder().setText(line).build()); | ||
| } | ||
| } | ||
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| // Waiting for new logs | ||
| boolean isTaskRunning = true; | ||
| while (isTaskRunning) { | ||
| isTaskRunning = Caches.RUNNING_TASKS.contains(request.getTaskId()); | ||
| readNewLogs(file, responseObserver); | ||
| Thread.sleep(1000); | ||
| } | ||
| } catch (Exception e) { | ||
| String errMsg = "Error when reading task log: " + e.getMessage() + ", please fix it"; | ||
| responseObserver.onNext(TaskLogReply.newBuilder().setText(errMsg).build()); | ||
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| log.error("Error reading task log", e); | ||
| Status status = Status.UNKNOWN.withDescription(e.getMessage()); | ||
| responseObserver.onError(status.asRuntimeException()); | ||
| } | ||
| } | ||
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| private void readNewLogs(RandomAccessFile file, StreamObserver<TaskLogReply> responseObserver) throws Exception { | ||
| long position = file.getFilePointer(); | ||
| if (position < file.length()) { | ||
| // Read new logs | ||
| file.seek(position); | ||
| if (file.readByte() != '\n') { | ||
| file.seek(position); | ||
| } | ||
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| String line = file.readLine(); | ||
| while (line != null) { | ||
| responseObserver.onNext(TaskLogReply.newBuilder().setText(line).build()); | ||
| line = file.readLine(); | ||
| } | ||
| } | ||
| } | ||
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| private String getLogFilePath(Long taskId) { | ||
| String baseDir; | ||
| if (SystemUtils.IS_OS_WINDOWS) { | ||
| baseDir = SystemUtils.getUserDir().getPath(); | ||
| } else { | ||
| File file = new File(this.getClass() | ||
| .getProtectionDomain() | ||
| .getCodeSource() | ||
| .getLocation() | ||
| .getPath()); | ||
| baseDir = file.getParentFile().getParentFile().getPath(); | ||
| } | ||
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| return baseDir + File.separator + "tasklogs" + File.separator + "task-" + taskId + ".log"; | ||
| } | ||
| } |
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35 changes: 35 additions & 0 deletions
35
bigtop-manager-grpc/src/main/resources/proto/task_log.proto
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,35 @@ | ||
| /* | ||
| * 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
| syntax = "proto3"; | ||
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| option java_multiple_files = true; | ||
| option java_package = "org.apache.bigtop.manager.grpc.generated"; | ||
| option java_outer_classname = "TaskLogProto"; | ||
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| service TaskLogService { | ||
| rpc GetLog (TaskLogRequest) returns (stream TaskLogReply) {} | ||
| } | ||
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| message TaskLogRequest { | ||
| int64 task_id = 1; | ||
| } | ||
|
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| message TaskLogReply { | ||
| string text = 1; | ||
| } |
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