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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
/*
* Copyright (c) 2005-2022 Xceptance Software Technologies GmbH
*
* 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.xceptance.xlt.engine.scripting;
import static com.xceptance.xlt.engine.util.ScriptingUtils.DEFAULT_PACKAGE;
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.lang3.StringUtils;
import com.gargoylesoftware.htmlunit.WebClient;
import com.xceptance.common.collection.LRUHashMap;
import com.xceptance.xlt.api.engine.Session;
import com.xceptance.xlt.api.engine.scripting.AbstractScriptTestCase;
import com.xceptance.xlt.api.tests.AbstractTestCase;
import com.xceptance.xlt.api.util.XltLogger;
import com.xceptance.xlt.api.util.XltProperties;
import com.xceptance.xlt.common.XltConstants;
import com.xceptance.xlt.engine.scripting.util.CommonScriptCommands;
/**
* Test context.
*
* @author Hartmut Arlt (Xceptance Software Technologies GmbH)
*/
public class TestContext
{
/**
* Test contexts.
*/
private static final Map CONTEXTS = new ConcurrentHashMap();
/**
* Default timeout property.
*/
private static final String PROP_TIMEOUT = XltConstants.XLT_PACKAGE_PATH + ".scripting.defaultTimeout";
/**
* Default implicit timeout property.
*/
private static final String PROP_IMPLICIT_TIMEOUT = XltConstants.XLT_PACKAGE_PATH + ".scripting.defaultImplicitWaitTimeout";
/**
* Default data cache size property.
*/
private static final String DATA_CACHE_SIZE = XltConstants.XLT_PACKAGE_PATH + ".scripting.dataCacheSize";
/**
* Default command timeout.
*/
private static final long defaultTimeout = XltProperties.getInstance().getProperty(PROP_TIMEOUT, 30000L);
/**
* Default implicit timeout used for element location.
*/
private final long defaultImplicitTimeout = XltProperties.getInstance().getProperty(PROP_IMPLICIT_TIMEOUT, 1000L);
/**
* Current implicit timeout used for element location.
*/
private final AtomicLong implicitTimeout = new AtomicLong(defaultImplicitTimeout);
/**
* Default data cache size.
*/
private static final int dataCacheSize = XltProperties.getInstance().getProperty(DATA_CACHE_SIZE, 32);
/**
* Command timeout.
*/
private final AtomicLong timeout = new AtomicLong(defaultTimeout);
/**
* Execution timer.
*/
private Timer timer = new Timer();
/**
* Current scope.
*/
private VariableScope _scope;
private VariableScope _rScope;
/**
* Base URL as string.
*/
private String _baseUrl = "";
/**
* Current web client.
*/
private WeakReference _webClient;
private WeakReference _adapter;
private volatile Map _globalData;
/**
* Loaded test data.
*/
private static final LRUHashMap> LOADED_DATA = new LRUHashMap>(dataCacheSize);
/**
* Loaded package data.
*/
private static final LRUHashMap> LOADED_PKG_DATA = new LRUHashMap>(dataCacheSize);
/**
* Default constructor. Declared private to prevent external instantiation.
*/
private TestContext()
{
// Empty
}
/**
* Returns the current context.
*
* @return current test context
*/
public static TestContext getCurrent()
{
final ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
TestContext c = CONTEXTS.get(threadGroup);
if (c == null)
{
synchronized (threadGroup)
{
c = CONTEXTS.get(threadGroup);
if (c == null)
{
c = new TestContext();
CONTEXTS.put(threadGroup, c);
}
}
}
return c;
}
/**
* Calls the given action and returns its result.
*
* @param action
* the action to perform
* @return result of the given action
*/
public T callAndWait(final Callable action)
{
return getTimer().run(action);
}
/**
* Returns the implicit timeout value as configured in the test suite settings.
*
* @return the timeout [ms]
*/
public long getDefaultImplicitTimeout()
{
return defaultImplicitTimeout;
}
/**
* Returns the current implicit timeout.
*
* @return the timeout [ms]
*/
public long getImplicitTimeout()
{
return implicitTimeout.get();
}
/**
* Sets the new implicit timeout.
*
* @param timeout
* the new timeout [ms]
*/
public void setImplicitTimeout(final long timeout)
{
final long to = Math.max(0L, timeout);
implicitTimeout.set(to);
}
/**
* Returns the command timeout value as configured in the test suite settings.
*
* @return the timeout [ms]
*/
public static long getDefaultTimeout()
{
return defaultTimeout;
}
/**
* Returns the command timeout.
*
* @return command timeout
*/
public long getTimeout()
{
return timeout.get();
}
/**
* Sets the command timeout.
*
* @param timeout
*/
public void setTimeout(final long timeout)
{
final long to = Math.max(0L, timeout);
this.timeout.set(to);
}
/**
* Shutdown.
*/
public void shutDown()
{
synchronized (this)
{
if (timer != null)
{
timer.stop();
}
}
setAdapter(null);
setWebClient(null);
setTimer(null);
setScope(null);
}
/**
* Returns the timer.
*
* @return timer
*/
private synchronized Timer getTimer()
{
if (timer == null)
{
timer = new Timer();
}
return timer;
}
/**
* Sets the timer.
*
* @param timer
* the timer
*/
private synchronized void setTimer(final Timer timer)
{
this.timer = timer;
}
private class Timer
{
private final ExecutorService service = Executors.newSingleThreadExecutor();
private T run(final Callable callable)
{
final Future future = service.submit(new Callable()
{
@Override
public T call() throws Exception
{
// set the thread's name again
Thread.currentThread().setName(Session.getCurrent().getUserID() + "-timer");
// delegate to the actual callable
return callable.call();
}
});
try
{
return future.get(timeout.get(), TimeUnit.MILLISECONDS);
}
catch (final InterruptedException e)
{
throw new ScriptException("Interrupted while waiting for action to finish", e);
}
catch (final ExecutionException e)
{
final Throwable cause = e.getCause();
if (cause instanceof RuntimeException)
{
throw (RuntimeException) cause;
}
throw new RuntimeException(cause);
}
catch (final TimeoutException e)
{
throw new PageLoadTimeoutException("Timed out waiting for page to load", e);
}
}
private void stop()
{
service.shutdownNow();
try
{
service.awaitTermination(timeout.get(), TimeUnit.MILLISECONDS);
}
catch (final InterruptedException e)
{
// There is nothing sensible to do.
}
}
}
/**
* Helper function used to retrieve the test data for the given object.
*
* @param key
* the object to retrieve test data for
* @return test data of given object
*/
private Map getData(final Object key)
{
if (key instanceof Script)
{
return getData((Script) key);
}
return getData(key.getClass());
}
/**
* Helper function used to retrieve the test data for the given object.
*
* @param key
* the object to retrieve test data for
* @return test data of given object
*/
private Map getData(final Script script)
{
Map data = LOADED_DATA.get(script);
if (data == null)
{
synchronized (LOADED_DATA)
{
data = LOADED_DATA.get(script);
if (data == null)
{
data = new HashMap(getPackageTestData(script));
data.putAll(TestDataUtils.getTestData(script));
LOADED_DATA.put(script, data);
}
}
}
return data;
}
/**
* Helper function used to retrieve the test data for the given object.
*
* @param key
* the object to retrieve test data for
* @return test data of given object
*/
private Map getData(final Class clazz)
{
Map data = LOADED_DATA.get(clazz);
if (data == null)
{
synchronized (LOADED_DATA)
{
data = LOADED_DATA.get(clazz);
if (data == null)
{
data = new HashMap(getPackageTestData(clazz));
data.putAll(TestDataUtils.getTestData(clazz));
LOADED_DATA.put(clazz, data);
}
}
}
return data;
}
/**
* Pops the current scope from the stack.
*/
public void popScope()
{
VariableScope scope = getScope();
if (scope != null)
{
scope = scope.getEnclosingScope();
}
setScope(scope);
}
/**
* Pushes the scope for the given object onto the stack.
*
* @param object
*/
public void pushScope(final Object object)
{
if (object == null)
{
throw new IllegalArgumentException();
}
VariableScope scope = getScope();
if (scope == null)
{
scope = new VariableScope(new HashMap());
getGlobalData();
}
if (object instanceof AbstractTestCase)
{
scope = new VariableScope(((AbstractTestCase) object).getTestDataSet(), scope);
}
if (!(object instanceof AbstractScriptTestCase))
{
scope = new VariableScope(getData(object), scope);
}
setScope(scope);
}
/**
* Gets the package test data for the given object.
*
* @param object
* the test object
*/
private Map getPackageTestData(final Script script)
{
final File baseDir = XlteniumScriptInterpreter.SCRIPTS_DIRECTORY;
final String packageName;
{
final File scriptFile = script.getScriptFile();
final ArrayList parts = new ArrayList();
File dir = scriptFile;
while ((dir = dir.getParentFile()) != null && !dir.equals(baseDir))
{
parts.add(0, dir.getName());
}
packageName = StringUtils.join(parts, '.');
}
return getPackageTestData(null, baseDir.getAbsolutePath(), packageName);
}
/**
* Returns the package test data for the given script package.
*
* @param clazz
* the context class to be used for resource lookup (pass {@code null} to force file lookup)
* @param baseDir
* the base directory to be used for data file lookup
* @param packageName
* the package name
* @return the package test data
*/
private static Map getPackageTestData(final Class clazz, final String baseDir, final String packageName)
{
final ArrayList pkgs = new ArrayList();
String pkgName = packageName;
int idx = pkgName.lastIndexOf('.');
while (idx > -1)
{
pkgs.add(pkgName);
pkgName = pkgName.substring(0, idx);
idx = pkgName.lastIndexOf('.');
}
if (!DEFAULT_PACKAGE.equals(pkgName))
{
pkgs.add(pkgName);
}
final Map m = new HashMap(getOrLoadPackageData(clazz, baseDir, DEFAULT_PACKAGE));
for (int i = pkgs.size() - 1; i >= 0; i--)
{
m.putAll(getOrLoadPackageData(clazz, baseDir, pkgs.get(i)));
}
return m;
}
/**
* Returns the package test data from the internal cache or loads it from disk.
*
* @param clazz
* the context class to be used for resource lookup (pass {@code null} to force file lookup)
* @param baseDir
* the base directory
* @param packageName
* the package name
* @return the package test data
*/
private static Map getOrLoadPackageData(final Class clazz, final String baseDir, final String packageName)
{
Map data = LOADED_PKG_DATA.get(packageName);
if (data == null)
{
synchronized (LOADED_PKG_DATA)
{
data = LOADED_PKG_DATA.get(packageName);
if (data == null)
{
data = TestDataUtils.getPackageTestData(clazz, baseDir, packageName);
LOADED_PKG_DATA.put(packageName, data);
}
}
}
return data;
}
/**
* Returns the package test data for the given test class.
*
* @param clazz
* the test class
* @return package test data
*/
private static Map getPackageTestData(final Class clazz)
{
final Package pkg = clazz.getPackage();
final String packageName = pkg == null ? DEFAULT_PACKAGE : pkg.getName();
try
{
final String baseDir;
if (packageName.length() > 0)
{
final int nbPkgDelims = org.apache.commons.lang3.StringUtils.countMatches(packageName, ".");
final StringBuilder sb = new StringBuilder();
sb.append("..");
for (int i = 0; i < nbPkgDelims; i++)
{
sb.append('/').append("..");
}
baseDir = sb.toString();
}
else
{
baseDir = ".";
}
return getPackageTestData(clazz, baseDir, packageName);
}
catch (final Exception e)
{
XltLogger.runTimeLogger.error("Failed to load test data for package '" + packageName + "'.", e);
}
return Collections.emptyMap();
}
/**
* Sets the web client.
*
* @param webClient
* the web client
*/
public synchronized void setWebClient(final WebClient webClient)
{
_webClient = new WeakReference(webClient);
}
/**
* Returns the web client.
*
* @return web client
*/
public synchronized WebClient getWebClient()
{
return _webClient.get();
}
/**
* Sets the current scope.
*
* @param scope
* the new current scope
*/
private synchronized void setScope(final VariableScope scope)
{
_scope = scope;
_rScope = null;
}
/**
* Returns the current scope.
*
* @return current scope
*/
private synchronized VariableScope getScope()
{
return _scope;
}
private VariableScope getRScope()
{
final VariableScope scope = getScope();
if (scope == null)
{
return null;
}
if (_rScope == null)
{
synchronized (this)
{
if (_rScope == null)
{
_rScope = new VariableScope(_globalData, scope);
}
}
}
return _rScope;
}
/**
* Returns the command adapter.
*
* @return command adapter
*/
public synchronized CommonScriptCommands getAdapter()
{
return _adapter.get();
}
/**
* Sets the command adapter.
*
* @param adapter
* the new command adapter
*/
public synchronized void setAdapter(final CommonScriptCommands adapter)
{
_adapter = new WeakReference(adapter);
}
/**
* Returns the global test data.
*
* @return global test data
*/
public synchronized Map getGlobalTestData()
{
return _globalData;
}
private void getGlobalData()
{
if (_globalData == null)
{
synchronized (this)
{
if (_globalData == null)
{
_globalData = TestDataUtils.getGlobalTestData();
}
}
}
}
private VariableScope getTopScope()
{
VariableScope scope = getScope();
if (scope != null)
{
while (scope.hasEnclosingScope())
{
scope = scope.getEnclosingScope();
}
}
return scope;
}
/**
* Inserts a new test data mapping where the given key is mapped to the given value.
*
* @param key
* the test data variable
* @param value
* the value of the variable
*/
public void storeValue(final String key, final String value)
{
final VariableScope scope = getTopScope();
if (scope != null)
{
scope.storeValue(key, value);
}
}
/**
* Resolves the given string.
*
* @param resolvable
* the string to be resolved
* @return the resolved string
*/
public String resolve(final String resolvable)
{
return getRScope().resolve(resolvable);
}
/**
* Resolves the given test data key
*
* @param key
* the key string containing only the name of a test data field
* @return resolved string or null if not found
*/
public String resolveKey(final String key)
{
return getRScope().resolveKey(key);
}
/**
* Returns the configured base URL as string.
*
* @return base URL as string (might be empty but is never null)
*/
public synchronized String getBaseUrl()
{
return _baseUrl;
}
/**
* Sets the base.
*
* @param baseUrl
* the base URL as string
*/
public synchronized void setBaseUrl(final String baseUrl)
{
_baseUrl = baseUrl == null ? "" : baseUrl;
}
}