/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.asakusafw.yaess.tools.log.basic;
import java.io.IOException;
import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.asakusafw.utils.io.Source;
import com.asakusafw.yaess.tools.log.YaessJobId;
import com.asakusafw.yaess.tools.log.YaessLogRecord;
/**
* Extracts {@link YaessLogRecord} from a YAESS log file with basic format.
* @since 0.6.2
*/
public class BasicYaessLogSource implements Source<YaessLogRecord> {
static final Logger LOG = LoggerFactory.getLogger(BasicYaessLogSource.class);
private final Source<String> recordSource;
private volatile YaessLogRecord nextRecord;
/**
* Creates a new instance.
* @param source the input source
*/
public BasicYaessLogSource(Source<String> source) {
this.recordSource = source;
}
@Override
public boolean next() throws IOException, InterruptedException {
this.nextRecord = prepare();
return nextRecord != null;
}
@Override
public YaessLogRecord get() throws IOException, InterruptedException {
YaessLogRecord result = nextRecord;
if (result == null) {
throw new NoSuchElementException();
}
return result;
}
@Override
public void close() throws IOException {
this.recordSource.close();
}
private YaessLogRecord prepare() throws IOException, InterruptedException {
while (recordSource.next()) {
String line = recordSource.get();
YaessLogRecord record = parse(line);
if (record != null) {
return record;
}
}
return null;
}
private YaessLogRecord parse(String line) {
LOG.debug("Parsing record: {}", line);
String code = extractCode(line);
if (code == null) {
LOG.debug("Not a YAESS job log: {}", line);
return null;
}
YaessJobId id = extractId(line);
if (id == null) {
LOG.debug("Failed to extract job ID: {}", line);
return null;
}
long time = extractTime(line);
if (time < 0L) {
LOG.debug("Failed to extract time: {}", line);
// continue
}
YaessLogRecord record = new YaessLogRecord();
record.setTime(time);
record.setCode(code);
record.setJobId(id);
return record;
}
private static final Pattern CODE_PATTERN = Pattern.compile("\\[(YS-\\w+-[A-Z]\\d+)\\]");
private String extractCode(String line) {
Matcher matcher = CODE_PATTERN.matcher(line);
if (matcher.find() == false) {
return null;
}
return matcher.group(1);
}
static final String TIME_PATTERN = "yyyy/MM/dd HH:mm:ss";
private static final ThreadLocal<DateFormat> TIME_FORMAT = new ThreadLocal<DateFormat>() {
@Override
protected DateFormat initialValue() {
SimpleDateFormat format = new SimpleDateFormat(TIME_PATTERN);
format.setLenient(true);
return format;
}
};
private long extractTime(String line) {
if (line.length() <= TIME_PATTERN.length()) {
return -1L;
}
char success = line.charAt(TIME_PATTERN.length());
if (success != '.' && Character.isWhitespace(success) == false) {
return -1L;
}
String dateString = line.substring(0, TIME_PATTERN.length());
try {
Date parsed = TIME_FORMAT.get().parse(dateString);
return parsed.getTime();
} catch (ParseException e) {
LOG.warn(MessageFormat.format(
"Invalid time \"{0}\": {1}",
dateString, line), e);
return -1L;
}
}
private static final String KEY_BATCH_ID = "batchId";
private static final String KEY_FLOW_ID = "flowId";
private static final String KEY_EXECUTION_ID = "executionId";
private static final String KEY_PHASE = "phase";
private static final String KEY_JOB_ID = "jobId";
private static final String KEY_SERVICE_ID = "serviceId";
private static final String KEY_TRACKING_ID = "trackingId";
private YaessJobId extractId(String line) {
Map<String, String> fields = extractFields(line);
if (fields.isEmpty()) {
return null;
}
YaessJobId id = new YaessJobId();
id.setBatchId(fields.get(KEY_BATCH_ID));
id.setFlowId(fields.get(KEY_FLOW_ID));
id.setExecutionId(fields.get(KEY_EXECUTION_ID));
id.setPhase(fields.get(KEY_PHASE));
id.setJobId(fields.get(KEY_JOB_ID));
id.setServiceId(fields.get(KEY_SERVICE_ID));
id.setTrackingId(fields.get(KEY_TRACKING_ID));
return id;
}
private static final String[] KEY_FIELDS = {
KEY_BATCH_ID,
KEY_FLOW_ID,
KEY_EXECUTION_ID,
KEY_PHASE,
KEY_JOB_ID,
KEY_SERVICE_ID,
KEY_TRACKING_ID,
};
private Map<String, String> extractFields(String line) {
Map<String, String> results = new HashMap<String, String>();
for (String key : KEY_FIELDS) {
int index = line.indexOf(key + '=');
if (index >= 0) {
String value = extractFieldValue(line, index + key.length() + 1);
if (value != null) {
results.put(key, value);
}
}
}
return results;
}
private String extractFieldValue(String line, int offset) {
int end = findEndOfField(line, offset);
if (end > offset) {
return line.substring(offset, end);
}
return null;
}
private int findEndOfField(String line, int offset) {
for (int i = offset, n = line.length(); i < n; i++) {
char c = line.charAt(i);
if (c == ' ') {
assert i >= 1;
if (line.charAt(i - 1) == ',') {
return i - 1;
}
return i;
} else if (c == '=') {
return -1;
}
}
return line.length();
}
}