/**
* Copyright 2013 Cloudera Inc.
*
* 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.
*/
package com.cloudera.cdk.examples.staging;
import com.cloudera.cdk.data.Dataset;
import com.cloudera.cdk.data.DatasetRepositories;
import com.cloudera.cdk.data.DatasetRepository;
import com.cloudera.cdk.data.DatasetWriter;
import com.google.common.collect.DiscreteDomains;
import com.google.common.collect.Ranges;
import java.util.Calendar;
import java.util.Random;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.generic.GenericRecordBuilder;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GenerateSimpleLogs extends Configured implements Tool {
private static final Logger LOG = LoggerFactory.getLogger(GenerateSimpleLogs.class);
public static final long DAY_IN_MILLIS = 24 * 60 * 60 * 1000;
public static final String[] LOG_LEVELS = new String[]
{"DEBUG", "INFO", "WARN", "ERROR"};
public static final String[] LOG_MESSAGES = new String[] {
"Calling internalFunction!!!",
"Still working",
"You probably don't care, but...",
"Users typed garbage into a field and something blew up"
};
@Override
public int run(String[] args) throws Exception {
// going to generate a lot of random log messages
final Random rand = new Random();
// open the repository
final DatasetRepository repo = DatasetRepositories.open("repo:file:/tmp/data");
// data is written to the staging dataset
final Dataset<GenericRecord> staging = repo.load("logs-staging");
final DatasetWriter<GenericRecord> writer = staging.newWriter();
// this is going to build our simple log records
final GenericRecordBuilder builder = new GenericRecordBuilder(
staging.getDescriptor().getSchema());
// generate timestamps 1 second apart starting... now
final Calendar now = Calendar.getInstance();
final long yesterday = now.getTimeInMillis() - DAY_IN_MILLIS;
try {
writer.open();
// generate 15,000 messages, each 5 seconds apart, starting 24 hours ago
// this is a little less than 24 hours worth of messages
for (int second : Ranges.closed(0, 15000).asSet(DiscreteDomains.integers())) {
LOG.info("Generating log message " + second);
builder.set("timestamp", yesterday + second * 5000);
builder.set("component", "GenerateSimpleLogs");
int level = rand.nextInt(LOG_LEVELS.length);
builder.set("level", LOG_LEVELS[level]);
builder.set("message", LOG_MESSAGES[level]);
writer.write(builder.build());
}
} finally {
writer.flush();
writer.close();
}
return 0;
}
public static void main(String... args) throws Exception {
int rc = ToolRunner.run(new GenerateSimpleLogs(), args);
System.exit(rc);
}
}