1 /* 2 * Copyright 2018, gRPC Authors All rights reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.grpc.services; 18 19 import com.google.protobuf.MessageLite; 20 import java.io.BufferedOutputStream; 21 import java.io.File; 22 import java.io.FileOutputStream; 23 import java.io.IOException; 24 import java.io.OutputStream; 25 import java.util.logging.Level; 26 import java.util.logging.Logger; 27 28 /** 29 * The output file goes to the JVM's temp dir with a prefix of BINARY_INFO. The proto messages 30 * are written serially using {@link MessageLite#writeDelimitedTo(OutputStream)}. 31 */ 32 class TempFileSink implements BinaryLogSink { 33 private static final Logger logger = Logger.getLogger(TempFileSink.class.getName()); 34 35 private final String outPath; 36 private final OutputStream out; 37 private boolean closed; 38 TempFileSink()39 TempFileSink() throws IOException { 40 File outFile = File.createTempFile("BINARY_INFO.", ""); 41 outPath = outFile.getPath(); 42 logger.log(Level.INFO, "Writing binary logs to to {0}", outFile.getAbsolutePath()); 43 out = new BufferedOutputStream(new FileOutputStream(outFile)); 44 } 45 getPath()46 String getPath() { 47 return this.outPath; 48 } 49 50 @Override write(MessageLite message)51 public synchronized void write(MessageLite message) { 52 if (closed) { 53 logger.log(Level.FINEST, "Attempt to write after TempFileSink is closed."); 54 return; 55 } 56 try { 57 message.writeDelimitedTo(out); 58 } catch (IOException e) { 59 logger.log(Level.SEVERE, "Caught exception while writing", e); 60 closeQuietly(); 61 } 62 } 63 64 @Override close()65 public synchronized void close() throws IOException { 66 if (closed) { 67 return; 68 } 69 closed = true; 70 try { 71 out.flush(); 72 } finally { 73 out.close(); 74 } 75 } 76 closeQuietly()77 private synchronized void closeQuietly() { 78 try { 79 close(); 80 } catch (IOException e) { 81 logger.log(Level.SEVERE, "Caught exception while closing", e); 82 } 83 } 84 } 85