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89 changes: 89 additions & 0 deletions
89
core/src/main/scala/org/apache/spark/util/FileLogger.scala
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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 | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.spark.util | ||
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| import java.io.{IOException, File, PrintWriter} | ||
| import java.text.SimpleDateFormat | ||
| import java.util.Date | ||
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| import org.apache.spark._ | ||
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| /** | ||
| * A generic class for logging information to file | ||
| */ | ||
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| class FileLogger(user: String, name: String, flushFrequency: Int = 1) extends Logging { | ||
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| private val DATE_FORMAT = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss") | ||
| private var logCount = 0 | ||
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| private val logDir = | ||
| if (System.getenv("SPARK_LOG_DIR") != null) { | ||
| System.getenv("SPARK_LOG_DIR") | ||
| } else { | ||
| "/tmp/spark-%s".format(user) | ||
| } | ||
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| private val logFile = logDir + "/" + name | ||
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| private val writer: PrintWriter = { | ||
| createLogDir() | ||
| new PrintWriter(logFile) | ||
| } | ||
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| def this() = this(System.getProperty("user.name", "<Unknown>"), | ||
| String.valueOf(System.currentTimeMillis())) | ||
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| def this(_name: String) = this(System.getProperty("user.name", "<Unknown>"), _name) | ||
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| /** Create a logging directory with the given path */ | ||
| private def createLogDir() { | ||
| val dir = new File(logDir) | ||
| if (!dir.exists && !dir.mkdirs()) { | ||
| // Logger should throw a exception rather than continue to construct this object | ||
| throw new IOException("create log directory error:" + logDir) | ||
| } | ||
| val file = new File(logFile) | ||
| if (file.exists) { | ||
| logWarning("Overwriting existing log file at %s".format(logFile)) | ||
| } | ||
| } | ||
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| /** Log the message to the given writer if it exists, optionally including the time */ | ||
| def log(msg: String, withTime: Boolean = false) = { | ||
| var writeInfo = msg | ||
| if (withTime) { | ||
| val date = new Date(System.currentTimeMillis()) | ||
| writeInfo = DATE_FORMAT.format(date) + ": " + msg | ||
| } | ||
| writer.print(writeInfo) | ||
| logCount += 1 | ||
| if (logCount % flushFrequency == 0) { | ||
| writer.flush() | ||
| logCount = 0 | ||
| } | ||
| } | ||
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| /** | ||
| * Log the message as a new line to the given writer if it exists, optionally including the time | ||
| */ | ||
| def logLine(msg: String, withTime: Boolean = false) = log(msg + "\n", withTime) | ||
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| /** Close the writer, if it exists */ | ||
| def close() = writer.close() | ||
| } |