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package com.sun.enterprise.web;
import com.sun.appserv.web.cache.CacheManager;
import com.sun.appserv.web.cache.mapping.CacheMapping;
import com.sun.appserv.web.cache.mapping.ConstraintField;
import com.sun.appserv.web.cache.mapping.Field;
import com.sun.appserv.web.cache.mapping.ValueConstraint;
import com.sun.enterprise.config.serverbeans.ConfigBeansUtilities;
import com.sun.enterprise.deployment.runtime.web.SunWebApp;
import org.glassfish.logging.annotation.LogMessageInfo;
import org.glassfish.web.deployment.runtime.*;
import org.apache.catalina.deploy.FilterDef;
import org.apache.catalina.deploy.FilterMap;
import javax.servlet.DispatcherType;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* configures the cache for the application
*/
public final class CacheModule {
public final static String CACHING_FILTER_CLASSNAME =
"com.sun.appserv.web.cache.filter.CachingFilter";
public final static String DEFAULT_CACHE_HELPER_CLASSNAME =
"com.sun.appserv.web.cache.DefaultCacheHelper";
public static final Logger logger = com.sun.enterprise.web.WebContainer.logger;
@LogMessageInfo(
message = "Configuring cache for web application",
level = "FINE")
public static final String CONFIGURE_CACHE = "AS-WEB-00251";
@LogMessageInfo(
message = "Added a caching filter for servlet-name = {0} url-pattern = {1}",
level = "FINE")
public static final String CACHING_FILTER_ADDED = "AS-WEB-00252";
@LogMessageInfo(
message = "Added a key-field : name = {0} scope = {1}",
level = "FINE")
public static final String KEY_FIELD_ADDED = "AS-WEB-00253";
@LogMessageInfo(
message = "Added a constraint: {0}",
level = "FINE")
public static final String CONSTRAINT_ADDED = "AS-WEB-00254";
@LogMessageInfo(
message = "Added a constraint-field name = {0} scope = {1}" +
"cache-on-match = {2} cache-on-match-failure = {3}",
level = "FINE")
public static final String CONSTRAINT_FIELD_ADDED = "AS-WEB-00255";
private static String trim(String str) {
if (str != null)
return str.trim();
return str;
}
/**
* configure ias-web response cache
* @param app WebModule containing the cache
* @param bean ias-web app config bean
* @throws Exception
*
* read the configuration and setup the runtime support for caching in a
* application.
*/
public static CacheManager configureResponseCache(WebModule app,
SunWebApp bean) throws Exception {
Cache cacheConfig = ((SunWebAppImpl)bean).getCache();
// is cache configured?
if (cacheConfig == null) {
return null;
}
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, CONFIGURE_CACHE, app.getPath());
}
// create the CacheManager object for this app
CacheManager manager = new CacheManager();
String name, value;
value = cacheConfig.getAttributeValue(Cache.ENABLED);
if (value != null) {
boolean enabled = ConfigBeansUtilities.toBoolean(value);
manager.setEnabled(enabled);
}
// set cache element's attributes and properties
value = cacheConfig.getAttributeValue(Cache.MAX_ENTRIES);
if (value != null) {
try {
int maxEntries = Integer.parseInt(value.trim());
manager.setMaxEntries(maxEntries);
} catch (NumberFormatException e) {
// XXX need error message
throw new Exception("invalid max-entries", e);
}
}
value = cacheConfig.getAttributeValue(Cache.TIMEOUT_IN_SECONDS);
if (value != null) {
try {
int defaultTimeout = Integer.parseInt(value.trim());
manager.setDefaultTimeout(defaultTimeout);
} catch (NumberFormatException e) {
// XXX need error message
throw new Exception("invalid timeout", e);
}
}
WebProperty[] props = cacheConfig.getWebProperty();
for (int i = 0; i < props.length; i++) {
name = props[i].getAttributeValue(WebProperty.NAME);
value = props[i].getAttributeValue(WebProperty.VALUE);
manager.addProperty(name, value);
}
// configure the default cache-helper
DefaultHelper defHelperConfig = cacheConfig.getDefaultHelper();
HashMap<String, String> map = new HashMap<String, String>();
if (defHelperConfig != null) {
props = defHelperConfig.getWebProperty();
for (int i = 0; i < props.length; i++) {
name = props[i].getAttributeValue(WebProperty.NAME);
value = props[i].getAttributeValue(WebProperty.VALUE);
map.put(name, value);
}
}
manager.setDefaultHelperProps(map);
// configure custom cache-helper classes
for (int i = 0; i < cacheConfig.sizeCacheHelper(); i++) {
CacheHelper helperConfig = cacheConfig.getCacheHelper(i);
String helperName = helperConfig.getAttributeValue(
CacheHelper.NAME);
HashMap<String, String> helperProps = new HashMap<String, String>();
props = helperConfig.getWebProperty();
for (int j = 0; j < props.length; j++) {
name = props[i].getAttributeValue(WebProperty.NAME);
value = props[i].getAttributeValue(WebProperty.VALUE);
helperProps.put(name, value);
}
helperProps.put("class-name",
helperConfig.getAttributeValue(
CacheHelper.CLASS_NAME));
manager.addCacheHelperDef(helperName, helperProps);
}
// for each cache-mapping, create CacheMapping, setup the filter
for (int i = 0; i < cacheConfig.sizeCacheMapping(); i++) {
org.glassfish.web.deployment.runtime.CacheMapping
mapConfig = cacheConfig.getCacheMapping(i);
CacheMapping mapping = new CacheMapping();
configureCacheMapping(mapConfig, mapping, logger);
// use filter's name to refer to setup the filter
String filterName = CACHING_FILTER_CLASSNAME + i;
/**
* all cache-mapings are indexed by the unique filter-name;
* DefaultCacheHelper uses this name to access the mapping.
*/
manager.addCacheMapping(filterName, mapping);
// setup the ias CachingFilter definition with the context
FilterDef filterDef = new FilterDef();
filterDef.setFilterName(filterName);
filterDef.setFilterClassName(CACHING_FILTER_CLASSNAME);
if (mapping.getServletName() != null) {
filterDef.addInitParameter("servletName",
mapping.getServletName());
}
if (mapping.getURLPattern() != null) {
filterDef.addInitParameter("URLPattern",
mapping.getURLPattern());
}
app.addFilterDef(filterDef);
// setup the mapping for the specified servlet-name or url-pattern
FilterMap filterMap = new FilterMap();
filterMap.setServletName(mapping.getServletName());
filterMap.setURLPattern(mapping.getURLPattern());
String[] dispatchers = mapConfig.getDispatcher();
if (dispatchers != null) {
EnumSet<DispatcherType> dispatcherTypes = null;
for (String dispatcher : dispatchers) {
// calls to FilterMap.setDispatcher are cumulative
if (dispatcherTypes == null) {
dispatcherTypes = EnumSet.of(
Enum.valueOf(DispatcherType.class, dispatcher));
} else {
dispatcherTypes.add(
Enum.valueOf(DispatcherType.class, dispatcher));
}
}
filterMap.setDispatcherTypes(dispatcherTypes);
}
filterMap.setFilterName(filterName);
app.addFilterMap(filterMap);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
CACHING_FILTER_ADDED,
new Object[] {mapping.getServletName(), mapping.getURLPattern()});
}
}
manager.setServletContext(app.getServletContext());
return manager;
}
/**
* configure ias-web cache-mapping
* @param Catalina context
* @param bean ias-web app cache-mapping config bean
* @throws Exception
*
*/
private static void configureCacheMapping(
org.glassfish.web.deployment.runtime.CacheMapping mapConfig,
CacheMapping mapping,
Logger logger) throws Exception {
String name, scope, value, expr;
/**
* <cache-mapping ((servlet-name|url-pattern)..)
*/
mapping.setServletName(trim(mapConfig.getServletName()));
mapping.setURLPattern(trim(mapConfig.getURLPattern()));
// resolve the helper for this mapping
String helperRef = mapConfig.getCacheHelperRef();
if (helperRef == null) {
helperRef = "default";
}
mapping.setHelperNameRef(helperRef);
/**
* <timeout>600</timeout>
* <timeout name="cacheTimeout" scope="request.attribute" />
*/
value = mapConfig.getTimeout();
if (value != null) {
try {
mapping.setTimeout(Integer.parseInt(value.trim()));
} catch (NumberFormatException e) {
throw new Exception("invalid timeout", e);
}
} else {
// XXX: get the timeout as a field?
name = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.TIMEOUT,
org.glassfish.web.deployment.runtime.CacheMapping.NAME);
scope = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.TIMEOUT,
org.glassfish.web.deployment.runtime.CacheMapping.SCOPE);
if (name != null && scope != null)
mapping.setTimeoutField(new Field(name, scope));
}
/**
* <refresh-field name="refreshNow" scope="request.attribute" />
*/
name = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.REFRESH_FIELD,
org.glassfish.web.deployment.runtime.CacheMapping.NAME);
scope = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.REFRESH_FIELD,
org.glassfish.web.deployment.runtime.CacheMapping.SCOPE);
if (name != null && scope != null) {
Field refreshField = new Field(name, scope);
mapping.setRefreshField(refreshField);
}
/** <http-method> GET </http-method>
* <http-method> POST </http-method>
*/
if (mapConfig.sizeHttpMethod() > 0) {
mapping.setMethods(mapConfig.getHttpMethod());
}
/**
* <key-field name="foo" scope="request.parameter"/>
*/
for (int i = 0; i < mapConfig.sizeKeyField(); i++) {
name = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.KEY_FIELD,
i, org.glassfish.web.deployment.runtime.CacheMapping.NAME);
scope = mapConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.CacheMapping.KEY_FIELD,
i, org.glassfish.web.deployment.runtime.CacheMapping.SCOPE);
if (name != null && scope != null) {
mapping.addKeyField(new Field(name, scope));
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, KEY_FIELD_ADDED, new Object[]{name, scope});
}
}
}
/**
* <constraint-field name="foo" scope="request.parameter">
* <value match-expr="equals"> 200 </value>
*/
for (int i = 0; i < mapConfig.sizeConstraintField(); i++) {
org.glassfish.web.deployment.runtime.ConstraintField
fieldConfig = mapConfig.getConstraintField(i);
name = fieldConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.ConstraintField.NAME);
scope = fieldConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.ConstraintField.SCOPE);
ConstraintField constraintField =
new ConstraintField(name, scope);
value = fieldConfig.getAttributeValue(org.glassfish.web.deployment.runtime.ConstraintField.CACHE_ON_MATCH);
if (value != null)
constraintField.setCacheOnMatch(ConfigBeansUtilities.toBoolean(value));
value = fieldConfig.getAttributeValue(org.glassfish.web.deployment.runtime.ConstraintField.CACHE_ON_MATCH_FAILURE);
if (value != null)
constraintField.setCacheOnMatchFailure(
ConfigBeansUtilities.toBoolean(value));
// now set the value's and the match expressions
for (int j = 0; j < fieldConfig.sizeValue(); j++) {
value = fieldConfig.getValue(j).trim();
expr = fieldConfig.getAttributeValue(
org.glassfish.web.deployment.runtime.ConstraintField.VALUE, j, org.glassfish.web.deployment.runtime.ConstraintField.MATCH_EXPR);
ValueConstraint constraint = new ValueConstraint(value, expr);
value = fieldConfig.getAttributeValue(org.glassfish.web.deployment.runtime.ConstraintField.VALUE, j, org.glassfish.web.deployment.runtime.ConstraintField.CACHE_ON_MATCH);
if (value != null) {
constraint.setCacheOnMatch(ConfigBeansUtilities.toBoolean(value));
}
value = fieldConfig.getAttributeValue(org.glassfish.web.deployment.runtime.ConstraintField.VALUE, j, org.glassfish.web.deployment.runtime.ConstraintField.CACHE_ON_MATCH_FAILURE);
if (value != null) {
constraint.setCacheOnMatchFailure(
ConfigBeansUtilities.toBoolean(value));
}
constraintField.addConstraint(constraint);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, CONSTRAINT_ADDED, constraint.toString());
}
}
mapping.addConstraintField(constraintField);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
CONSTRAINT_FIELD_ADDED,
new Object[]{
name,
scope,
constraintField.getCacheOnMatch(),
constraintField.getCacheOnMatchFailure()});
}
}
}
}