package com.google.appengine.tools.development;
import com.google.appengine.tools.development.EnvironmentVariableChecker.MismatchReportingPolicy;
import com.google.apphosting.utils.config.AppEngineConfigException;
import com.google.apphosting.utils.config.AppEngineWebXml;
import com.google.apphosting.utils.config.AppEngineWebXml.ScalingType;
import com.google.apphosting.utils.config.BackendsXml;
import com.google.apphosting.utils.config.BackendsXmlReader;
import com.google.apphosting.utils.config.BackendsYamlReader;
import com.google.apphosting.utils.config.EarHelper;
import com.google.apphosting.utils.config.EarInfo;
import com.google.apphosting.utils.config.WebModule;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedMap;
import java.io.File;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.logging.Logger;
import javax.annotation.concurrent.GuardedBy;
/**
* Manager for an application's configuration. Supports both single WAR
* directory configurations and EAR directory configurations. Also includes
* support for rereading configurations.
* <p>
*/
public class ApplicationConfigurationManager {
private static final Logger LOGGER =
Logger.getLogger(ApplicationConfigurationManager.class.getName());
private final File configurationRoot;
private final SystemPropertiesManager systemPropertiesManager;
private final String sdkRelease;
private final File applicationSchemaFile;
@GuardedBy("this")
private MismatchReportingPolicy environmentVariableMismatchReportingPolicy =
MismatchReportingPolicy.EXCEPTION;
@GuardedBy("this")
private final List<ModuleConfigurationHandle> moduleConfigurationHandles;
/**
* Creates a new {@link ApplicationConfigurationManager} from an EAR directory.
*/
static ApplicationConfigurationManager newEarConfigurationManager(File earRoot,
String sdkVersion, File applicationSchemaFile)
throws AppEngineConfigException {
return newEarConfigurationManager(earRoot, sdkVersion, applicationSchemaFile, "");
}
public static ApplicationConfigurationManager newEarConfigurationManager(File earRoot,
String sdkVersion, File applicationSchemaFile, String appIdPrefix)
throws AppEngineConfigException {
if (!EarHelper.isEar(earRoot.getAbsolutePath())) {
String message = String.format(
"ApplicationConfigurationManager.newEarConfigurationManager passed an invalid EAR: %s",
earRoot.getAbsolutePath());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
return new ApplicationConfigurationManager(earRoot, null, null, null, sdkVersion,
applicationSchemaFile, appIdPrefix);
}
/**
* Creates a new {@link ApplicationConfigurationManager} from a WAR directory.
* <p>
* @param warRoot The location of the war directory.
* @param externalResourceDirectory If not {@code null}, a resource directory external
* to the applicationDirectory. This will be searched before
* applicationDirectory when looking for resources.
* @param webXmlLocation The location of a file whose format complies with
* http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd. If null we will use
* <appDir>/WEB-INF/web.xml.
* @param appEngineWebXmlLocation The location of the app engine config file.
* If null we will use <appDir>/WEB-INF/appengine-web.xml.
* @param sdkRelease The sdk version (SdkInfo.getLocalVersion().getRelease()).
*/
static ApplicationConfigurationManager newWarConfigurationManager(File warRoot,
File appEngineWebXmlLocation, File webXmlLocation, File externalResourceDirectory,
String sdkRelease) throws AppEngineConfigException {
return newWarConfigurationManager(warRoot, appEngineWebXmlLocation, webXmlLocation,
externalResourceDirectory, sdkRelease, "");
}
public static ApplicationConfigurationManager newWarConfigurationManager(File warRoot,
File appEngineWebXmlLocation, File webXmlLocation, File externalResourceDirectory,
String sdkRelease, String appIdPrefix) throws AppEngineConfigException {
if (EarHelper.isEar(warRoot.getAbsolutePath())) {
String message = String.format(
"ApplicationConfigurationManager.newWarConfigurationManager passed an EAR: %s",
warRoot.getAbsolutePath());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
return new ApplicationConfigurationManager(warRoot,
appEngineWebXmlLocation, webXmlLocation, externalResourceDirectory, sdkRelease,
null, appIdPrefix);
}
/**
* Returns the {@link ModuleConfigurationHandle} for the primary module which
* will be the only module for configurations read from a single WAR directory
* or the first module in applicationDirectory/META-INF/application.xml
* module order for configurations read from an EAR directory.
*/
synchronized ModuleConfigurationHandle getPrimaryModuleConfigurationHandle() {
return moduleConfigurationHandles.get(0);
}
/**
* Returns {@link List} with a {@link ModuleConfigurationHandle} for each
* configured module.
* <p>
* The returned list is immutable.
*/
public synchronized List<ModuleConfigurationHandle> getModuleConfigurationHandles() {
return ImmutableList.copyOf(moduleConfigurationHandles);
}
/**
* Constructs an {@link ApplicationConfigurationManager} by reading the
* configuration from an exploded WAR directory or EAR directory.
*
* @param configurationRoot the root directory for the applications EAR or WAR.
* @param appEngineWebXmlLocation for a WAR configuration a non null value
* overrides the default of configurationRoot/WEB-INF/appengine-web.xml and
* ignored for an EAR configuration.
* @param webXmlLocation for a WAR configuration a non null value
* overrides the default of configurationRoot/WEB-INF/web.xml and ignored
* for an EAR configuration.
* @param externalResourceDirectory for a WAR configuration the optional
* external resource directory or null and ignored for an EAR configuration.
* @param sdkRelease the SDK version string.
* @param applicationSchemaFile the appengine-application.xsd schema file for validation.
*/
private ApplicationConfigurationManager(File configurationRoot, File appEngineWebXmlLocation,
File webXmlLocation, File externalResourceDirectory, String sdkRelease,
File applicationSchemaFile, String appIdPrefix) {
this.configurationRoot = configurationRoot;
this.systemPropertiesManager = new SystemPropertiesManager();
this.sdkRelease = sdkRelease;
this.applicationSchemaFile = applicationSchemaFile;
if (EarHelper.isEar(configurationRoot.getAbsolutePath())) {
EarInfo earInfo = readEarConfiguration();
ImmutableList.Builder<ModuleConfigurationHandle> builder = ImmutableList.builder();
for (WebModule module : earInfo.getWebModules()) {
builder.add(new EarModuleConfigurationHandle(module));
}
moduleConfigurationHandles = builder.build();
} else {
ModuleConfigurationHandle warConfigurationHandle = new WarModuleConfigurationHandle(
appEngineWebXmlLocation, webXmlLocation, externalResourceDirectory, appIdPrefix);
warConfigurationHandle.readConfiguration();
moduleConfigurationHandles = ImmutableList.of(warConfigurationHandle);
}
}
/**
* Performs various validations and registers logging configuration and
* system properties for a {@link WebModule} so they may be combined with
* values from other modules to construct an applications runtime
* configuration.
* <p>
* Though this function provides little or no real abstraction and badly
* fails the 'does one thing' test it avoids some code duplication..
*
* @param module module
* @param loggingConfigurationManager for validating and combining the
* the applications logging configuration.
* @param externalResourceDirectory the externalResourceDirectory for
* obtaining logging configuration.
*/
private synchronized void validateAndRegisterGlobalValues(WebModule module,
LoggingConfigurationManager loggingConfigurationManager,
File externalResourceDirectory) {
module.getWebXml().validate();
AppEngineWebXml appEngineWebXml = module.getAppEngineWebXml();
loggingConfigurationManager.read(systemPropertiesManager.getOriginalSystemProperties(),
appEngineWebXml.getSystemProperties(), module.getApplicationDirectory(),
externalResourceDirectory);
systemPropertiesManager.setSystemProperties(appEngineWebXml, module.getAppEngineWebXmlFile());
}
/**
* Reads or rereads an application's EAR configuration, performs validations,
* and calculate the application's logging configuration and system
* properties.
* @return the {@link EarInfo} for the configuration.
*/
private synchronized EarInfo readEarConfiguration() {
if (!EarHelper.isEar(configurationRoot.getAbsolutePath())) {
String message = String.format("Unsupported update from EAR to WAR for: %s",
configurationRoot.getAbsolutePath());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
EarInfo earInfo = EarHelper.readEarInfo(configurationRoot.getAbsolutePath(),
applicationSchemaFile);
String majorVersionId = null;
String urlStreamHandlerType = null;
LoggingConfigurationManager loggingConfigurationManager = new LoggingConfigurationManager();
for (WebModule module : earInfo.getWebModules()) {
module.getWebXml().validate();
AppEngineWebXml appEngineWebXml = module.getAppEngineWebXml();
if (majorVersionId == null) {
majorVersionId = appEngineWebXml.getMajorVersionId();
urlStreamHandlerType = appEngineWebXml.getUrlStreamHandlerType();
}
validateAndRegisterGlobalValues(module, loggingConfigurationManager, null);
}
systemPropertiesManager.setAppengineSystemProperties(sdkRelease,
earInfo.getAppengineApplicationXml().getApplicationId(), majorVersionId);
loggingConfigurationManager.updateLoggingConfiguration();
updateUrlStreamHandlerMode(urlStreamHandlerType);
return earInfo;
}
/**
* Checks that the applications combined environment variables are consistent
* and reports inconsistencies based on {@link
* #getEnvironmentVariableMismatchReportingPolicy}.
*/
private synchronized void checkEnvironmentVariables() {
EnvironmentVariableChecker environmentVariableChecker =
new EnvironmentVariableChecker(environmentVariableMismatchReportingPolicy);
for (ModuleConfigurationHandle moduleConfigurationHandle : moduleConfigurationHandles) {
WebModule module = moduleConfigurationHandle.getModule();
environmentVariableChecker.add(module.getAppEngineWebXml(), module.getAppEngineWebXmlFile());
}
environmentVariableChecker.check();
}
public synchronized void setEnvironmentVariableMismatchReportingPolicy(
MismatchReportingPolicy environmentVariableMismatchReportingPolicy) {
this.environmentVariableMismatchReportingPolicy = environmentVariableMismatchReportingPolicy;
}
synchronized MismatchReportingPolicy getEnvironmentVariableMismatchReportingPolicy() {
return this.environmentVariableMismatchReportingPolicy;
}
private void updateUrlStreamHandlerMode(String urlStreamHandlerType) {
LocalURLFetchServiceStreamHandler.setUseNativeHandlers(
urlStreamHandlerType != null &&
AppEngineWebXml.URL_HANDLER_NATIVE.equals(urlStreamHandlerType));
}
@Override
public synchronized String toString() {
return "ApplicationConfigurationManager: configurationRoot=" + configurationRoot
+ " systemPropertiesManager=" + systemPropertiesManager
+ " sdkVersion=" + sdkRelease
+ " environmentVariableMismatchReportingPolicy="
+ environmentVariableMismatchReportingPolicy
+ " moduleConfigurationHandles=" + moduleConfigurationHandles;
}
/**
* Handle for accessing and rereading a module configuration.
* <p>
* A WAR configuration supports a single module with additional
* backends specified in war/WEB-INF/backends.xml. All instances
* of the single module and all backends instances share a single
* {@link ModuleConfigurationHandle} so updates made by a call to
* {@link #readConfiguration()} will be visible to all module and backend
* instances. An EAR configuration supports multiple modules. All instances
* of a module share a single {@link ModuleConfigurationHandle} so updates
* made by a call to {@link #readConfiguration()} for a particular module are
* visible to all instances of the module.
* <p>
* To control when changes become visible clients should keep and refresh
* references to values which will be replaced when the configuration is
* reread including {@link #getModule()} and for WAR configurations
* {@link #getBackendsXml()}.
* <p>
* Implementations synchronize operations that read or write state
* that may be changed by {@link #readConfiguration()} on
* ApplicationConfigurationManager.this. Note that configuration updates
* involving edits to multiple configuration files are not guaranteed to be
* atomic in the case {@link #readConfiguration()} is called after one write
* and before another during a multi-write configuration change. Given this
* and that backends are about to be deprecated, no synchronized operation
* is provided for a client to obtain the combined values returned by calling
* {@link #getModule()} and then calling {@link #getBackendsXml()}.
*/
public interface ModuleConfigurationHandle {
/**
* Returns the {@link WebModule} for this configuration.
*/
WebModule getModule();
/**
* Checks if the configuration specifies environment variables that do not
* match the JVM's environment variables.
* <p>
* This check is broken out rather than implemented during construction for
* backwards compatibility. The check is deferred until {@link DevAppServer#start()}
* to give {@link DevAppServer} clients a chance to call
* {@link DevAppServer#setThrowOnEnvironmentVariableMismatch(boolean)}
* before reporting errors.
*/
void checkEnvironmentVariables();
/**
* Returns the {@link BackendsXml} for this configuration.
* <p>
* For EAR configurations this will return null. For WAR configurations this
* will return a value read from the war/WEB-INF/backends.xml if one is
* specified or null otherwise.
*/
BackendsXml getBackendsXml();
/**
* Reads or rereads the configuration from disk to pick up any changes.
* Calling this function affects global state visible to all the modules
* in the application including:
* <ol>
* <li> system properties
* <li> the logging configuration
* </ol>
*
* Because for EAR configurations the global state includes information from
* all the modules in the EAR, this rereads the configuration for every module.
* This does not update the {@link ModuleConfigurationHandle} for any other
* modules. Certain configuration changes are not currently supported
* including changes that
* <ol>
* <li> Adds entries to {@link ApplicationConfigurationManager#getModuleConfigurationHandles()}
* <li> removes entries from
* {@link ApplicationConfigurationManager#getModuleConfigurationHandles()}
* <li> Changes the application directory for a {@link ModuleConfigurationHandle} returned
* by {@link ApplicationConfigurationManager#getModuleConfigurationHandles()}
* </ol>
* @throws AppEngineConfigException if the configuration on disk is not valid
* or includes unsupported changes.
*/
void readConfiguration() throws AppEngineConfigException;
/**
* Clears {link {@link System#getProperties()} values that have been set by this
* configuration.
*/
void restoreSystemProperties();
}
private class WarModuleConfigurationHandle implements ModuleConfigurationHandle {
private final File rawAppEngineWebXmlLocation;
private final File rawWebXmlLocation;
private final File externalResourceDirectory;
private final String appIdPrefix;
@GuardedBy("ApplicationConfigurationManager.this")
private BackendsXml backendsXml;
@GuardedBy("ApplicationConfigurationManager.this")
private WebModule webModule;
/**
* @param appEngineWebXmlLocation absolute paths are accepted, relative
* paths are under applicationDirectory and null means to use
* applicationDirectory/WEB-INF/appengine-web.xml.
* @param webXmlLocation absolute paths are accepted, relative
* paths are under applicationDirectory and null means to use
* applicationDirectory/WEB-INF/web.xml.
* @param externalResourceDirectory If not {@code null}, a resource directory external
* to the applicationDirectory. This will be searched before
* applicationDirectory when looking for resources.
*/
WarModuleConfigurationHandle(File appEngineWebXmlLocation, File webXmlLocation,
File externalResourceDirectory, String appIdPrefix) {
this.rawAppEngineWebXmlLocation = appEngineWebXmlLocation;
this.rawWebXmlLocation = webXmlLocation;
this.externalResourceDirectory = externalResourceDirectory;
this.appIdPrefix = appIdPrefix;
}
@Override
public WebModule getModule() {
synchronized (ApplicationConfigurationManager.this) {
return webModule;
}
}
@Override
public void checkEnvironmentVariables() {
ApplicationConfigurationManager.this.checkEnvironmentVariables();
}
@Override
public BackendsXml getBackendsXml() {
synchronized (ApplicationConfigurationManager.this) {
return backendsXml;
}
}
@Override
public void readConfiguration() {
synchronized (ApplicationConfigurationManager.this) {
if (EarHelper.isEar(configurationRoot.getAbsolutePath())) {
String message = String.format("Unsupported update from WAR to EAR for: %s",
configurationRoot.getAbsolutePath());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
WebModule updatedWebModule = EarHelper.readWebModule(null, configurationRoot,
rawAppEngineWebXmlLocation, rawWebXmlLocation, appIdPrefix);
if (webModule != null) {
checkDynamicModuleUpdateAllowed(webModule, updatedWebModule);
}
webModule = updatedWebModule;
String baseDir = configurationRoot.getAbsolutePath();
File webinf = new File(baseDir, "WEB-INF");
backendsXml =
new BackendsXmlReader(baseDir).readBackendsXml();
if (backendsXml == null) {
BackendsYamlReader backendsYaml = new BackendsYamlReader(webinf.getPath());
backendsXml = backendsYaml.parse();
}
AppEngineWebXml appEngineWebXml = webModule.getAppEngineWebXml();
String appId = System.getenv("APPLICATION_ID");
if (appId == null
&& (appEngineWebXml.getAppId() == null || appEngineWebXml.getAppId().isEmpty())) {
appId = "no_app_id";
}
if (appId != null) {
appEngineWebXml.setAppId(appId);
}
LoggingConfigurationManager loggingConfigurationManager = new LoggingConfigurationManager();
validateAndRegisterGlobalValues(webModule, loggingConfigurationManager,
externalResourceDirectory);
systemPropertiesManager.setAppengineSystemProperties(sdkRelease,
appEngineWebXml.getAppId(), appEngineWebXml.getMajorVersionId());
loggingConfigurationManager.updateLoggingConfiguration();
updateUrlStreamHandlerMode(appEngineWebXml.getUrlStreamHandlerType());
}
}
@Override
public void restoreSystemProperties() {
synchronized (ApplicationConfigurationManager.this) {
systemPropertiesManager.restoreSystemProperties();
}
}
@Override
public String toString() {
synchronized (ApplicationConfigurationManager.this) {
return "WarConfigurationHandle: webModule=" + webModule
+ " backendsXml=" + backendsXml
+ " appEngineWebXmlLocation=" + rawAppEngineWebXmlLocation
+ " webXmlLocation=" + rawWebXmlLocation
+ " externalResourceDirectory=" + externalResourceDirectory;
}
}
}
private class EarModuleConfigurationHandle implements ModuleConfigurationHandle {
@GuardedBy("ApplicationConfigurationManager.this")
private WebModule webModule;
EarModuleConfigurationHandle(WebModule webModule) {
this.webModule = webModule;
}
@Override
public WebModule getModule() {
synchronized (ApplicationConfigurationManager.this) {
return webModule;
}
}
@Override
public void checkEnvironmentVariables() {
synchronized (ApplicationConfigurationManager.this) {
ApplicationConfigurationManager.this.checkEnvironmentVariables();
}
}
@Override
public BackendsXml getBackendsXml() {
return null;
}
@Override
public void readConfiguration() {
synchronized (ApplicationConfigurationManager.this) {
EarInfo earInfo = readEarConfiguration();
checkDynamicUpdateAllowed(earInfo);
for (WebModule module : earInfo.getWebModules()) {
if (module.getApplicationDirectory().equals(webModule.getApplicationDirectory())) {
webModule = module;
return;
}
}
throw new IllegalStateException("Expected web module not found.");
}
}
/**
* Checks that the passed in {@link EarInfo} which was read from the EAR
* directory for this {@link ApplicationConfigurationManager} is consistent
* with the current configuration for purposes of a dynamic configuration
* update. The following restrictions apply
* <ol>
* <li> The set of WAR directory names may not change.
* <li> Module names may not change.
* <li> Module {@link ScalingType} may not change.
* <li> For modules with a configured number of instances the configured number
* may not change.
* </ol>
* @throws AppEngineConfigException if the modules do not match.
*/
@GuardedBy("ApplicationConfigurationManager.this")
private void checkDynamicUpdateAllowed(EarInfo updatedEarInfo) throws AppEngineConfigException {
Map<File, WebModule> currentModuleMap = getCurrentModuleMap();
Map<File, WebModule> updatedModuleMap = getUpdatedModuleMap(updatedEarInfo);
checkWarDirectoriesMatch(currentModuleMap.keySet(), updatedModuleMap.keySet());
for (File currentWarFile : currentModuleMap.keySet()) {
WebModule currentModule = currentModuleMap.get(currentWarFile);
WebModule updatedModule = updatedModuleMap.get(currentWarFile);
checkDynamicModuleUpdateAllowed(currentModule, updatedModule);
}
}
@GuardedBy("ApplicationConfigurationManager.this")
private Map<File, WebModule> getCurrentModuleMap() {
ImmutableSortedMap.Builder<File, WebModule> currentModuleMapBuilder =
ImmutableSortedMap.naturalOrder();
for (ModuleConfigurationHandle handle : moduleConfigurationHandles) {
currentModuleMapBuilder.put(handle.getModule().getApplicationDirectory(),
handle.getModule());
}
return currentModuleMapBuilder.build();
}
private Map<File, WebModule> getUpdatedModuleMap(EarInfo earInfo) {
ImmutableSortedMap.Builder<File, WebModule> updatedModuleMapBuilder =
ImmutableSortedMap.naturalOrder();
for (WebModule module : earInfo.getWebModules()) {
updatedModuleMapBuilder.put(module.getApplicationDirectory(), module);
}
return updatedModuleMapBuilder.build();
}
private void checkWarDirectoriesMatch(Set<File>currentWarDirectories,
Set<File>updatedWarDirectories) {
if (!currentWarDirectories.equals(updatedWarDirectories)) {
String message = String.format(
"Unsupported configuration change of war directories from '%s' to '%s'",
currentWarDirectories, updatedWarDirectories);
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
}
@Override
public void restoreSystemProperties() {
synchronized (ApplicationConfigurationManager.this) {
systemPropertiesManager.restoreSystemProperties();
}
}
@Override
public String toString() {
synchronized (ApplicationConfigurationManager.this) {
return "WarConfigurationHandle: webModule=" + webModule;
}
}
}
private static void checkDynamicModuleUpdateAllowed(WebModule currentModule,
WebModule updatedModule) throws AppEngineConfigException {
checkServerNamesMatch(currentModule, updatedModule);
checkScalingTypesMatch(currentModule, updatedModule);
checkInstanceCountsMatch(currentModule, updatedModule);
}
private static void checkServerNamesMatch(WebModule currentModule, WebModule updatedModule)
throws AppEngineConfigException {
String currentModuleName = currentModule.getModuleName();
String updatedModuleName = updatedModule.getModuleName();
if (!currentModuleName.equals(updatedModuleName)) {
String message = String.format(
"Unsupported configuration change of module name from '%s' to '%s' in '%s'",
currentModuleName, updatedModuleName, currentModule.getAppEngineWebXmlFile());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
}
private static void checkScalingTypesMatch(WebModule currentModule, WebModule updatedModule)
throws AppEngineConfigException {
ScalingType currentScalingType = currentModule.getAppEngineWebXml().getScalingType();
ScalingType updatedScalingType = updatedModule.getAppEngineWebXml().getScalingType();
if (!currentScalingType.equals(updatedScalingType)) {
String message = String.format(
"Unsupported configuration change of scaling from '%s' to '%s' in '%s'",
currentScalingType, updatedScalingType, currentModule.getAppEngineWebXmlFile());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
}
private static void checkInstanceCountsMatch(WebModule currentModule, WebModule updatedModule)
throws AppEngineConfigException {
ScalingType currentScalingType = currentModule.getAppEngineWebXml().getScalingType();
switch (currentScalingType) {
case MANUAL:
String currentManualInstances =
currentModule.getAppEngineWebXml().getManualScaling().getInstances();
String updatedManualInstances =
updatedModule.getAppEngineWebXml().getManualScaling().getInstances();
if (!Objects.equals(currentManualInstances, updatedManualInstances)) {
String template = "Unsupported configuration change of manual scaling instances from '%s' "
+ "to '%s' in '%s'";
String message = String.format(template, currentManualInstances, updatedManualInstances,
currentModule.getAppEngineWebXmlFile());
LOGGER.severe(message);
throw new AppEngineConfigException(message);
}
break;
case BASIC:
String currentBasicMaxInstances =
currentModule.getAppEngineWebXml().getBasicScaling().getMaxInstances();
String updatedBasicMaxInstances =
updatedModule.getAppEngineWebXml().getBasicScaling().getMaxInstances();
if (!Objects.equals(currentBasicMaxInstances, updatedBasicMaxInstances)) {
String template = "Unsupported configuration change of basic scaling max instances "
+ "from '%s' to '%s' in '%s'";
String message = String.format(template, currentBasicMaxInstances,
updatedBasicMaxInstances, currentModule.getAppEngineWebXmlFile());
LOGGER.severe(message);
}
break;
default:
}
}
}