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Liberty Managed Container integration for the Arquillian Project
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/*
* Copyright 2018, IBM Corporation, Red Hat Middleware LLC, and individual contributors
* identified by the Git commit log.
*
* 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 io.openliberty.arquillian.managed.exceptions;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import io.openliberty.arquillian.managed.exceptions.NestedExceptionBuilder.ExMsg;
/**
* Finds deployment exceptions by reading FFDC files
*/
public class FFDCExceptionLocator implements DeploymentExceptionLocator {
private static Logger log = Logger.getLogger(FFDCExceptionLocator.class.getName());
private final String logsDirectory;
public FFDCExceptionLocator(String logsDirectory) {
this.logsDirectory = logsDirectory;
}
@Override
public Throwable getException(String appName, String logLine, long deploymentTime) {
// Get the set of ffdc files
File[] ffdcFiles = getFfdcFilesSince(deploymentTime);
// Get StateChangeException FFDC file for this application
File ffdc = findStateChangeExceptionFfdcFileForApp(appName, ffdcFiles);
Throwable cause = null;
if (ffdc != null) {
// Get StateChangeException ffdc exception names and info chain
ArrayList chain = getExceptionCausalChain(ffdc);
if (chain != null) {
cause = NestedExceptionBuilder.buildNestedException(chain);
}
}
for (Throwable c = cause; c != null; c = c.getCause()) {
log.finest("FFDC Exception Chain:" + c.getClass());
}
return cause;
}
/**
* Get the set of FFDC files, we are only called when we are expecting to see
* some FFDC's so we will loop, waiting for 1/100th of a second and up to 10
* seconds until we see at least on FFDC. Normally we will not have to wait at
* all.
*
* @return an array of File from the FFDC dir that start "ffdc_"
* @throws IOException
*/
private File[] getFfdcFilesSince(Long deployTime) {
// We want to look for all FFDCs from at least 1 second before deploy until
// now...
final long AT_LEAST_ONE_SECOND = (1 * 1000) + 1;
// Perhaps we have not passed in the deploy time - if so scan all FFDCs:
final long since = deployTime != null ? (deployTime - AT_LEAST_ONE_SECOND) : 0;
File[] ffdcFiles = null;
int attempts = 0;
do {
try {
Thread.sleep(100);
} catch (InterruptedException e1) {
// do nothing
}
File ffdcDir = null;
String ffdcDirPath = "NOT_SET";
ffdcDirPath = logsDirectory + "/ffdc";
ffdcDir = new File(ffdcDirPath);
log.finest(
"FFDC Dir: " + ffdcDir.getAbsolutePath() + "looking for ffdc_* file since "
+ new Timestamp(since));
ffdcFiles = ffdcDir.listFiles(new FilenameFilter() {
public boolean accept(File dir, String fileName) {
File ffdcFile = new File(dir, fileName);
return (ffdcFile.lastModified() >= since) && fileName.startsWith("ffdc_");
}
});
attempts++;
log.finest("FFDC files are: " + Arrays.toString(ffdcFiles));
} while ((ffdcFiles == null || ffdcFiles.length == 0) && attempts <= 100);
return ffdcFiles;
}
/**
* Find the app's StateChangeException FFDC file (using Java 6 compatible code).
*
* @param appName
* @param ffdcFiles
*
* @return The correct FFDC File or null
*
* @throws FileNotFoundException
* @throws IOException
*/
private File findStateChangeExceptionFfdcFileForApp(String appName, File[] ffdcFiles) {
BufferedReader br = null;
try {
for (int i = 0; i < ffdcFiles.length; i++) {
// Set up a bufferedReader
File ffdcFile = ffdcFiles[i];
log.finest("Processing FFDC file: " + ffdcFile.getAbsolutePath());
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(ffdcFile)));
} catch (FileNotFoundException e) {
log.warning("File " + ffdcFile.getAbsolutePath() + " is no longer accessible");
continue; // File has been deleted but it might not have been the target one
}
// See if it fulfills the criteria
try {
boolean fileIsForStateChangeException = false;
boolean fileIsForCorrectApplication = false;
String line;
while ((line = br.readLine()) != null) {
fileIsForStateChangeException = fileIsForStateChangeException || line
.contains("Stack Dump = com.ibm.ws.container.service.state.StateChangeException");
log.finest("fileIsForStateChangeException:" + fileIsForStateChangeException + " " + line);
fileIsForCorrectApplication = fileIsForCorrectApplication
|| line.contains("appName") && line.contains(appName);
log.finest("fileIsForCorrectApplication:" + fileIsForCorrectApplication + "(" + appName + ")"
+ " " + line);
// Have we found all the criteria we are looking for?
if (fileIsForStateChangeException && fileIsForCorrectApplication) {
// We have found what we are looking for
log.finest("Found StateChangeExceptionFfdc for " + appName + ": "
+ ffdcFile.getAbsolutePath());
return ffdcFile;
}
}
log.finest("Did not find StateChangeExceptionFfdc for " + appName + ": "
+ ffdcFile.getAbsolutePath() + "(file was scanned completely)");
} catch (IOException e) {
log.warning("File " + ffdcFile.getAbsolutePath() + " is not readable");
continue; // File has perhaps deleted but not necessarily a disaster if we find what we
// need later
}
}
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
log.warning(e.getMessage());
}
}
}
// We did not find what we are looking for
log.finest("No StateChangeExceptionFfdc for " + appName + " was found ");
return null;
}
/**
* Get a list of ExMsg objects representing Exceptions in a FFDC log file
*
* @param ffdc
* the ffdc file being processed
* @return an ordered list of exceptions, as ExMsg, foundß
*/
private ArrayList getExceptionCausalChain(File ffdc) {
ArrayList result = new ArrayList();
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(ffdc)));
String line;
// FFDC files have the form:
// Stack Dump = com.ibm.ws.container.service.state.StateChangeException:
// Caused by: org.jboss.weld.exceptions.WeldException:
// Caused by: org.jboss.weld.exceptions.DefinitionException:
while ((line = br.readLine()) != null) {
Pattern p = Pattern.compile("(Stack Dump = |Caused by: )([\\p{L}\\p{N}_$\\.]+?)(:|$)(.*)");
Matcher m = p.matcher(line);
if (m.matches()) {
ExMsg x = new ExMsg();
x.exName = m.group(2);
x.logMsg = line;
log.finest("match on line: " + line + " resolved to className " + x.exName);
result.add(x);
} else {
log.finest("no match found on line: " + line);
}
}
} catch (IOException e) {
// We are OK to return empty handed (and fail the test if needed) but will log
// the event...
log.warning("FFDC file " + ffdc != null ? ffdc.getAbsolutePath()
: "null" + " IO Exception: " + e.toString());
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
log.warning(e.getMessage());
}
}
}
log.finest("Exception stack found was: " + Arrays.deepToString(result.toArray()));
return result;
}
}