/*
* 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.
*/
package org.apache.geode.internal.admin.remote;
import org.apache.geode.DataSerializer;
import org.apache.geode.distributed.internal.DistributionConfig;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LocalizedMessage;
import org.apache.geode.internal.logging.log4j.LogWriterAppender;
import org.apache.geode.internal.logging.log4j.LogWriterAppenders;
import org.apache.logging.log4j.Logger;
import java.io.*;
// import org.apache.geode.distributed.DistributedSystem;
// import java.util.*;
public final class TailLogResponse extends AdminResponse {
private static final Logger logger = LogService.getLogger();
private String tail;
private String childTail;
public static TailLogResponse create(DistributionManager dm,
InternalDistributedMember recipient) {
TailLogResponse m = new TailLogResponse();
m.setRecipient(recipient);
try {
InternalDistributedSystem sys = dm.getSystem();
LogWriterAppender lwa = LogWriterAppenders.getAppender(LogWriterAppenders.Identifier.MAIN);
if (lwa != null) {
m.childTail = tailSystemLog(lwa.getChildLogFile());
m.tail = tailSystemLog(sys.getConfig());
if (m.tail == null) {
m.tail =
LocalizedStrings.TailLogResponse_NO_LOG_FILE_WAS_SPECIFIED_IN_THE_CONFIGURATION_MESSAGES_WILL_BE_DIRECTED_TO_STDOUT
.toLocalizedString();
}
} else {
// Assert.assertTrue(false, "TailLogRequest/Response processed in application vm with shared
// logging.");
m.childTail = tailSystemLog((File) null);
m.tail = tailSystemLog(sys.getConfig());
if (m.tail == null) {
m.tail =
LocalizedStrings.TailLogResponse_NO_LOG_FILE_WAS_SPECIFIED_IN_THE_CONFIGURATION_MESSAGES_WILL_BE_DIRECTED_TO_STDOUT
.toLocalizedString();
}
}
} catch (IOException e) {
logger.warn(LocalizedMessage
.create(LocalizedStrings.TailLogResponse_ERROR_OCCURRED_WHILE_READING_SYSTEM_LOG__0, e));
m.tail = "";
}
return m;
}
public int getDSFID() {
return TAIL_LOG_RESPONSE;
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
DataSerializer.writeString(tail, out);
DataSerializer.writeString(childTail, out);
}
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
super.fromData(in);
tail = DataSerializer.readString(in);
childTail = DataSerializer.readString(in);
}
public String getTail() {
return tail;
}
public String getChildTail() {
return childTail;
}
@Override
public String toString() {
return "TailLogResponse from " + this.getRecipient() + " <TAIL>" + getTail() + "</TAIL>";
}
public static String tailSystemLog(File logFile) throws IOException {
if (logFile == null || logFile.equals(new File(""))) {
return null;
}
int numLines = 30;
int maxBuffer = 65500; // DataOutput.writeUTF will only accept 65535 bytes
long fileLength = logFile.length();
byte[] buffer = (fileLength > maxBuffer) ? new byte[maxBuffer] : new byte[(int) fileLength];
int readSize = buffer.length;
RandomAccessFile f = new RandomAccessFile(logFile, "r");
f.seek(fileLength - readSize);
f.read(buffer, 0, readSize);
f.close();
String messageString = new String(buffer);
char[] text = messageString.toCharArray();
for (int i = text.length - 1, j = 0; i >= 0; i--) {
if (text[i] == '[')
j++;
if (j == numLines) {
messageString = messageString.substring(i);
break;
}
}
return messageString.trim();
}
// private static String readSystemLog(File logFile) throws IOException {
// if (logFile == null || logFile.equals(new File(""))) {
// return null;
// }
// long fileLength = logFile.length();
// byte[] buffer = new byte[(int)fileLength];
// BufferedInputStream in = new BufferedInputStream(new FileInputStream(logFile));
// in.read(buffer, 0, buffer.length);
// return new String(buffer).trim();
// }
// private static String readSystemLog(DistributionConfig sc) throws IOException {
// File logFile = sc.getLogFile();
// if (logFile == null || logFile.equals(new File(""))) {
// return null;
// }
// if (!logFile.isAbsolute()) {
// logFile = new File(logFile.getAbsolutePath());
// }
// return readSystemLog(logFile);
// }
private static String tailSystemLog(DistributionConfig sc) throws IOException {
File logFile = sc.getLogFile();
if (logFile == null || logFile.equals(new File(""))) {
return null;
}
if (!logFile.isAbsolute()) {
logFile = new File(logFile.getAbsolutePath());
}
return tailSystemLog(logFile);
}
}