Java tutorial
package com.blackberry.logtools; /** Copyright (c) 2014 BlackBerry Limited * * Licensed 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. */ /** * Cat Logs in a given file set. * <p> * Usage: [genericOptions] [-Dlogdriver.search.start.time=X] [-Dlogdriver.search.end.time=X] input [input ...] output * <p> * */ import java.io.File; import java.util.ArrayList; import org.apache.commons.lang.RandomStringUtils; import org.apache.commons.lang.StringEscapeUtils; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.conf.Configured; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.util.Tool; import org.apache.hadoop.util.ToolRunner; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.blackberry.logdriver.util.CatByTime; public class logcat extends Configured implements Tool { static int info = 1; static int warn = 2; static int error = 3; public static void main(String[] argv) throws Exception { //Let ToolRunner handle generic command-line options int res = ToolRunner.run(new Configuration(), new logcat(), argv); System.exit(res); } public int run(String[] argv) throws Exception { //Configuring configuration and filesystem to work on HDFS final Configuration conf = getConf(); //Configuration processed by ToolRunner FileSystem fs = FileSystem.get(conf); //Initiate tools used for running search LogTools tools = new LogTools(); //Other options String date_format = "RFC5424"; String field_separator = " "; ArrayList<String> D_options = new ArrayList<String>(); boolean quiet = true; boolean silent = false; boolean log = false; boolean forcelocal = false; boolean forceremote = false; //The arguments are // - dc number // - service // - component // - startTime (Something 'date' can parse, or just a time in ms from epoch) // - endTime (Same as start) // - outputDir //Indexing for arguments to be passed for Mapreduce int dcNum = 0; int svcNum = 1; int compNum = 2; int startNum = 3; int endNum = 4; int outNum = 5; //Parsing through user arguments String[] args = new String[6]; int count = 0; //Count created to track the parse of all arguments int argcount = 0; //Count created to track number of arguments to be passed on while (count < argv.length) { String arg = argv[count]; count++; if (arg.equals("--")) { break; } else if (arg.startsWith("-")) { if (arg.equals("--v")) { quiet = tools.parseV(silent); } else if (arg.startsWith("--dateFormat=")) { arg = arg.replace("--dateFormat=", ""); date_format = arg; } else if (arg.startsWith("--fieldSeparator=")) { arg = arg.replace("--fieldSeparator=", ""); field_separator = arg; } else if (arg.startsWith("-dc=")) { arg = arg.replace("-dc=", ""); args[dcNum] = arg; argcount++; } else if (arg.startsWith("-svc=")) { arg = arg.replace("-svc=", ""); args[svcNum] = arg; argcount++; } else if (arg.startsWith("-comp=")) { arg = arg.replace("-comp=", ""); args[compNum] = arg; argcount++; } else if (arg.startsWith("-start=")) { arg = arg.replace("-start=", ""); args[startNum] = arg; argcount++; } else if (arg.startsWith("-end=")) { arg = arg.replace("-end=", ""); args[endNum] = arg; argcount++; } else if (arg.startsWith("--out=")) { args[outNum] = tools.parseOut(arg, fs); argcount++; } else if (arg.startsWith("-D")) { D_options.add(arg); } else if (arg.equals("--silent")) { silent = tools.parseSilent(quiet); } else if (arg.equals("--log")) { log = true; } else if (arg.equals("--l")) { forcelocal = tools.parsePigMode(forceremote); } else if (arg.equals("--r")) { forceremote = tools.parsePigMode(forcelocal); } else { LogTools.logConsole(quiet, silent, error, "Unrecognized option: " + arg); System.exit(1); } } else { LogTools.logConsole(quiet, silent, error, "Unrecognized option: " + arg); System.exit(1); } } //Default output should be stdout represented by "-" if (args[outNum] == null) { args[outNum] = "-"; argcount++; LogTools.logConsole(quiet, silent, info, "Output set to default stdout."); } if (argcount < 6) { System.err.println(";****************************************" + "\n\t\t\t NOT ENOUGH ARGUMENTS\n" + "\n\tUSAGE: logcat [REQUIRED ARGUMENTS] [OPTIONS] (Order does not matter)" + "\n\tREQUIRED ARGUMENTS:" + "\n\t\t-dc=[DATACENTER] Data Center." + "\n\t\t-svc=[SERVICE] Service." + "\n\t\t-comp=[COMPONENT] Component." + "\n\t\t-start=[START] Start time." + "\n\t\t-end=[END] End time." + "\n\tOptions:" + "\n\t\t--out=[DIRECTORY] Desired output directory. If not defined, output to stdout." + "\n\t\t--v Verbose output." + "\n\t\t--r Force remote sort." + "\n\t\t--l Force local sort." + "\n\t\t--dateFormat=[FORMAT] Valid formats are RFC822, RFC3164 (zero padded day)," + "\n\t RFC5424 (default), or any valid format string for FastDateFormat." + "\n\t\t--fieldSeparator=X The separator to use to separate fields in intermediate" + "\n\t files. Defaults to 'INFORMATION SEPARATOR ONE' (U+001F)." + "\n\t\t--silent Output only the data." + "\n\t\t--log Save all the logs.\n" + ";****************************************"); System.exit(1); } //Parse time inputs for start and end of search args[startNum] = tools.parseDate(args[startNum]); args[endNum] = tools.parseDate(args[endNum]); tools.checkTime(args[startNum], args[endNum]); //Retrieve 'out' argument to determine where output of results should be sent String out = args[outNum]; //Generate files to temporarily store output of mapreduce jobs and pig logs locally File local_output = File.createTempFile("tmp.", RandomStringUtils.randomAlphanumeric(10)); if (log != true) { local_output.deleteOnExit(); } File pig_tmp = File.createTempFile("tmp.", RandomStringUtils.randomAlphanumeric(10)); if (log != true) { pig_tmp.deleteOnExit(); } //Name the temp directory for storing results in HDFS String tmp = "tmp/logcat-" + RandomStringUtils.randomAlphanumeric(10); //Set args[outNum] to be temp output directory to be passed onto CatByTime instead of UserInput argument args[outNum] = (StringEscapeUtils.escapeJava(tmp) + "/rawlines"); //Managing console output - deal with --v/--silent Logger LOG = LoggerFactory.getLogger(logcat.class); tools.setConsoleOutput(local_output, quiet, silent); //Create temp directory in HDFS to store logsearch logs before sorting tools.tmpDirHDFS(quiet, silent, fs, conf, tmp, log); LogTools.logConsole(quiet, silent, warn, "Gathering logs..."); LogTools.logConsole(quiet, silent, warn, "Passing Arguments: DC=" + args[dcNum] + " Service=" + args[svcNum] + " Component=" + args[compNum] + " StartTime=" + args[startNum] + " EndTime=" + args[endNum] + " Output=" + out); //Set standard configuration for running Mapreduce and PIG String queue_name = "logsearch"; //Start Mapreduce job tools.runMRJob(quiet, silent, conf, D_options, out, LOG, field_separator, queue_name, args, "CatByTime", new CatByTime()); //Before sorting, determine the number of records and size of the results found long foundresults = tools.getResults(local_output); long size = tools.getSize(foundresults, tmp, fs); //Run PIG job if results found tools.runPig(silent, quiet, foundresults, size, tmp, out, D_options, queue_name, date_format, field_separator, pig_tmp, fs, conf, forcelocal, forceremote); //Display location of tmp files if log enabled tools.logs(log, local_output, pig_tmp, tmp); return 0; } }