/* * 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.catalina; import javax.servlet.ServletContext; import org.apache.tomcat.util.http.mapper.Mapper; import org.apache.catalina.deploy.ApplicationParameter; import org.apache.catalina.deploy.ErrorPage; import org.apache.catalina.deploy.FilterDef; import org.apache.catalina.deploy.FilterMap; import org.apache.catalina.deploy.LoginConfig; import org.apache.catalina.deploy.NamingResources; import org.apache.catalina.deploy.SecurityConstraint; import org.apache.catalina.util.CharsetMapper; /** * A <b>Context</b> is a Container that represents a servlet context, and * therefore an individual web application, in the Catalina servlet engine. * It is therefore useful in almost every deployment of Catalina (even if a * Connector attached to a web server (such as Apache) uses the web server's * facilities to identify the appropriate Wrapper to handle this request. * It also provides a convenient mechanism to use Interceptors that see * every request processed by this particular web application. * <p> * The parent Container attached to a Context is generally a Host, but may * be some other implementation, or may be omitted if it is not necessary. * <p> * The child containers attached to a Context are generally implementations * of Wrapper (representing individual servlet definitions). * <p> * * @author Craig R. McClanahan * */ public interface Context extends Container { // ----------------------------------------------------- Manifest Constants /** * The LifecycleEvent type sent when a context is reloaded. */ public static final String RELOAD_EVENT = "reload"; /** * Container event for changing the ID of a session. */ public static final String CHANGE_SESSION_ID_EVENT = "changeSessionId"; // ------------------------------------------------------------- Properties /** * Return the set of initialized application event listener objects, * in the order they were specified in the web application deployment * descriptor, for this application. * * @exception IllegalStateException if this method is called before * this application has started, or after it has been stopped */ public Object[] getApplicationEventListeners(); /** * Store the set of initialized application event listener objects, * in the order they were specified in the web application deployment * descriptor, for this application. * * @param listeners The set of instantiated listener objects. */ public void setApplicationEventListeners(Object listeners[]); /** * Return the set of initialized application lifecycle listener objects, * in the order they were specified in the web application deployment * descriptor, for this application. * * @exception IllegalStateException if this method is called before * this application has started, or after it has been stopped */ public Object[] getApplicationLifecycleListeners(); /** * Store the set of initialized application lifecycle listener objects, * in the order they were specified in the web application deployment * descriptor, for this application. * * @param listeners The set of instantiated listener objects. */ public void setApplicationLifecycleListeners(Object listeners[]); /** * Return the application available flag for this Context. */ public boolean getAvailable(); /** * Set the application available flag for this Context. * * @param available The new application available flag */ public void setAvailable(boolean available); /** * Return the Locale to character set mapper for this Context. */ public CharsetMapper getCharsetMapper(); /** * Set the Locale to character set mapper for this Context. * * @param mapper The new mapper */ public void setCharsetMapper(CharsetMapper mapper); /** * Return the path to a file to save this Context information. */ public String getConfigFile(); /** * Set the path to a file to save this Context information. * * @param configFile The path to a file to save this Context information. */ public void setConfigFile(String configFile); /** * Return the "correctly configured" flag for this Context. */ public boolean getConfigured(); /** * Set the "correctly configured" flag for this Context. This can be * set to false by startup listeners that detect a fatal configuration * error to avoid the application from being made available. * * @param configured The new correctly configured flag */ public void setConfigured(boolean configured); /** * Return the "use cookies for session ids" flag. */ public boolean getCookies(); /** * Set the "use cookies for session ids" flag. * * @param cookies The new flag */ public void setCookies(boolean cookies); /** * Gets the name to use for session cookies. Overrides any setting that * may be specified by the application. * * @return The value of the default session cookie name or null if not * specified */ public String getSessionCookieName(); /** * Sets the name to use for session cookies. Overrides any setting that * may be specified by the application. * * @param sessionCookieName The name to use */ public void setSessionCookieName(String sessionCookieName); /** * Gets the value of the use HttpOnly cookies for session cookies flag. * * @return <code>true</code> if the HttpOnly flag should be set on session * cookies */ public boolean getUseHttpOnly(); /** * Sets the use HttpOnly cookies for session cookies flag. * * @param useHttpOnly Set to <code>true</code> to use HttpOnly cookies * for session cookies */ public void setUseHttpOnly(boolean useHttpOnly); /** * Gets the domain to use for session cookies. Overrides any setting that * may be specified by the application. * * @return The value of the default session cookie domain or null if not * specified */ public String getSessionCookieDomain(); /** * Sets the domain to use for session cookies. Overrides any setting that * may be specified by the application. * * @param sessionCookieDomain The domain to use */ public void setSessionCookieDomain(String sessionCookieDomain); /** * Gets the path to use for session cookies. Overrides any setting that * may be specified by the application. * * @return The value of the default session cookie path or null if not * specified */ public String getSessionCookiePath(); /** * Sets the path to use for session cookies. Overrides any setting that * may be specified by the application. * * @param sessionCookiePath The path to use */ public void setSessionCookiePath(String sessionCookiePath); /** * Return the "allow crossing servlet contexts" flag. */ public boolean getCrossContext(); /** * Return the alternate Deployment Descriptor name. */ public String getAltDDName(); /** * Set an alternate Deployment Descriptor name. */ public void setAltDDName(String altDDName) ; /** * Set the "allow crossing servlet contexts" flag. * * @param crossContext The new cross contexts flag */ public void setCrossContext(boolean crossContext); /** * Return the display name of this web application. */ public String getDisplayName(); /** * Set the display name of this web application. * * @param displayName The new display name */ public void setDisplayName(String displayName); /** * Return the distributable flag for this web application. */ public boolean getDistributable(); /** * Set the distributable flag for this web application. * * @param distributable The new distributable flag */ public void setDistributable(boolean distributable); /** * Return the document root for this Context. This can be an absolute * pathname, a relative pathname, or a URL. */ public String getDocBase(); /** * Set the document root for this Context. This can be an absolute * pathname, a relative pathname, or a URL. * * @param docBase The new document root */ public void setDocBase(String docBase); /** * Is URL rewriting disabled? * URL rewriting is an optional component of the servlet 2.5 specification. * However if set to true this will be non-compliant with the specification * as the specification requires that there <b>must</b> be a way to retain * sessions if the client doesn't allow session cookies. * * @return true If URL rewriting is disabled. * * @see <a href="http://jcp.org/aboutJava/communityprocess/mrel/jsr154/index2.html">Servlet * 2.5 Specification. Sections SRV.7.1.3 and SRV.7.1.4</a> * @see javax.servlet.http.HttpServletResponse#encodeURL(String) encodeURL * @see javax.servlet.http.HttpServletResponse#encodeRedirectURL(String) * encodeRedirectURL */ public boolean isDisableURLRewriting(); /** * Is URL rewriting disabled? * URL rewriting is an optional component of the servlet 2.5 specification. * However if set to true this will be non-compliant with the specification * as the specification requires that there <b>must</b> be a way to retain * sessions if the client doesn't allow session cookies. * * @param disable True to disable URL Rewriting. Default <b>false</b>. */ public void setDisableURLRewriting(boolean disable); /** * Return the URL encoded context path, using UTF-8. */ public String getEncodedPath(); /** * Return the boolean on the annotations parsing. */ public boolean getIgnoreAnnotations(); /** * Set the boolean on the annotations parsing for this web * application. * * @param ignoreAnnotations The boolean on the annotations parsing */ public void setIgnoreAnnotations(boolean ignoreAnnotations); /** * Return the login configuration descriptor for this web application. */ public LoginConfig getLoginConfig(); /** * Set the login configuration descriptor for this web application. * * @param config The new login configuration */ public void setLoginConfig(LoginConfig config); /** * Get the request dispatcher mapper. */ public Mapper getMapper(); /** * Return the naming resources associated with this web application. */ public NamingResources getNamingResources(); /** * Set the naming resources for this web application. * * @param namingResources The new naming resources */ public void setNamingResources(NamingResources namingResources); /** * Return the context path for this web application. */ public String getPath(); /** * Set the context path for this web application. * * @param path The new context path */ public void setPath(String path); /** * Return the public identifier of the deployment descriptor DTD that is * currently being parsed. */ public String getPublicId(); /** * Set the public identifier of the deployment descriptor DTD that is * currently being parsed. * * @param publicId The public identifier */ public void setPublicId(String publicId); /** * Return the reloadable flag for this web application. */ public boolean getReloadable(); /** * Set the reloadable flag for this web application. * * @param reloadable The new reloadable flag */ public void setReloadable(boolean reloadable); /** * Return the override flag for this web application. */ public boolean getOverride(); /** * Set the override flag for this web application. * * @param override The new override flag */ public void setOverride(boolean override); /** * Return the privileged flag for this web application. */ public boolean getPrivileged(); /** * Set the privileged flag for this web application. * * @param privileged The new privileged flag */ public void setPrivileged(boolean privileged); /** * Return the servlet context for which this Context is a facade. */ public ServletContext getServletContext(); /** * Return the default session timeout (in minutes) for this * web application. */ public int getSessionTimeout(); /** * Set the default session timeout (in minutes) for this * web application. * * @param timeout The new default session timeout */ public void setSessionTimeout(int timeout); /** * Return the value of the swallowOutput flag. */ public boolean getSwallowOutput(); /** * Set the value of the swallowOutput flag. If set to true, the system.out * and system.err will be redirected to the logger during a servlet * execution. * * @param swallowOutput The new value */ public void setSwallowOutput(boolean swallowOutput); /** * Return the Java class name of the Wrapper implementation used * for servlets registered in this Context. */ public String getWrapperClass(); /** * Set the Java class name of the Wrapper implementation used * for servlets registered in this Context. * * @param wrapperClass The new wrapper class */ public void setWrapperClass(String wrapperClass); /** * Will the parsing of the web.xml file for this Context be performed by a * namespace aware parser? * * @return true if namespace awareness is enabled. */ public boolean getXmlNamespaceAware(); /** * Controls whether the parsing of the web.xml file for this Context will be * performed by a namespace aware parser. * * @param xmlNamespaceAware true to enable namespace awareness */ public void setXmlNamespaceAware(boolean xmlNamespaceAware); /** * Will the parsing of the web.xml file for this Context be performed by a * validating parser? * * @return true if validation is enabled. */ public boolean getXmlValidation(); /** * Controls whether the parsing of the web.xml file for this Context will be * performed by a validating parser. * * @param xmlValidation true to enable xml validation */ public void setXmlValidation(boolean xmlValidation); /** * *.tld files are always parsed using a namespace aware parser. * * @return Always <code>true</code> * * @deprecated This option will be removed in 8.0.x. */ @Deprecated public boolean getTldNamespaceAware(); /** * *.tld files are always parsed using a namespace aware parser. * * @param tldNamespaceAware ignored * * @deprecated This option will be removed in 8.0.x. */ @Deprecated public void setTldNamespaceAware(boolean tldNamespaceAware); /** * Will the parsing of web.xml, web-fragment.xml, *.tld, *.jspx, *.tagx and * tagplugin.xml files for this Context block the use of external entities? * * @return true if access to external entities is blocked */ public boolean getXmlBlockExternal(); /** * Controls whether the parsing of web.xml, web-fragment.xml, *.tld, *.jspx, * *.tagx and tagplugin.xml files for this Context will block the use of * external entities. * * @param xmlBlockExternal true to block external entities */ public void setXmlBlockExternal(boolean xmlBlockExternal); /** * Will the parsing of *.tld files for this Context be performed by a * validating parser? * * @return true if validation is enabled. */ public boolean getTldValidation(); /** * Controls whether the parsing of *.tld files for this Context will be * performed by a validating parser. * * @param tldValidation true to enable xml validation */ public void setTldValidation(boolean tldValidation); // --------------------------------------------------------- Public Methods /** * Add a new Listener class name to the set of Listeners * configured for this application. * * @param listener Java class name of a listener class */ public void addApplicationListener(String listener); /** * Add a new application parameter for this application. * * @param parameter The new application parameter */ public void addApplicationParameter(ApplicationParameter parameter); /** * Add a security constraint to the set for this web application. */ public void addConstraint(SecurityConstraint constraint); /** * Add an error page for the specified error or Java exception. * * @param errorPage The error page definition to be added */ public void addErrorPage(ErrorPage errorPage); /** * Add a filter definition to this Context. * * @param filterDef The filter definition to be added */ public void addFilterDef(FilterDef filterDef); /** * Add a filter mapping to this Context. * * @param filterMap The filter mapping to be added */ public void addFilterMap(FilterMap filterMap); /** * Add the classname of an InstanceListener to be added to each * Wrapper appended to this Context. * * @param listener Java class name of an InstanceListener class */ public void addInstanceListener(String listener); /** * Add the given URL pattern as a jsp-property-group. This maps * resources that match the given pattern so they will be passed * to the JSP container. Though there are other elements in the * property group, we only care about the URL pattern here. The * JSP container will parse the rest. * * @param pattern URL pattern to be mapped */ public void addJspMapping(String pattern); /** * Add a Locale Encoding Mapping (see Sec 5.4 of Servlet spec 2.4) * * @param locale locale to map an encoding for * @param encoding encoding to be used for a give locale */ public void addLocaleEncodingMappingParameter(String locale, String encoding); /** * Add a new MIME mapping, replacing any existing mapping for * the specified extension. * * @param extension Filename extension being mapped * @param mimeType Corresponding MIME type */ public void addMimeMapping(String extension, String mimeType); /** * Add a new context initialization parameter, replacing any existing * value for the specified name. * * @param name Name of the new parameter * @param value Value of the new parameter */ public void addParameter(String name, String value); /** * Add a security role reference for this web application. * * @param role Security role used in the application * @param link Actual security role to check for */ public void addRoleMapping(String role, String link); /** * Add a new security role for this web application. * * @param role New security role */ public void addSecurityRole(String role); /** * Add a new servlet mapping, replacing any existing mapping for * the specified pattern. * * @param pattern URL pattern to be mapped * @param name Name of the corresponding servlet to execute */ public void addServletMapping(String pattern, String name); /** * Add a JSP tag library for the specified URI. * * @param uri URI, relative to the web.xml file, of this tag library * @param location Location of the tag library descriptor */ public void addTaglib(String uri, String location); /** * Add a resource which will be watched for reloading by the host auto * deployer. Note: this will not be used in embedded mode. * * @param name Path to the resource, relative to docBase */ public void addWatchedResource(String name); /** * Add a new welcome file to the set recognized by this Context. * * @param name New welcome file name */ public void addWelcomeFile(String name); /** * Add the classname of a LifecycleListener to be added to each * Wrapper appended to this Context. * * @param listener Java class name of a LifecycleListener class */ public void addWrapperLifecycle(String listener); /** * Add the classname of a ContainerListener to be added to each * Wrapper appended to this Context. * * @param listener Java class name of a ContainerListener class */ public void addWrapperListener(String listener); /** * Factory method to create and return a new Wrapper instance, of * the Java implementation class appropriate for this Context * implementation. The constructor of the instantiated Wrapper * will have been called, but no properties will have been set. */ public Wrapper createWrapper(); /** * Return the set of application listener class names configured * for this application. */ public String[] findApplicationListeners(); /** * Return the set of application parameters for this application. */ public ApplicationParameter[] findApplicationParameters(); /** * Return the set of security constraints for this web application. * If there are none, a zero-length array is returned. */ public SecurityConstraint[] findConstraints(); /** * Return the error page entry for the specified HTTP error code, * if any; otherwise return <code>null</code>. * * @param errorCode Error code to look up */ public ErrorPage findErrorPage(int errorCode); /** * Return the error page entry for the specified Java exception type, * if any; otherwise return <code>null</code>. * * @param exceptionType Exception type to look up */ public ErrorPage findErrorPage(String exceptionType); /** * Return the set of defined error pages for all specified error codes * and exception types. */ public ErrorPage[] findErrorPages(); /** * Return the filter definition for the specified filter name, if any; * otherwise return <code>null</code>. * * @param filterName Filter name to look up */ public FilterDef findFilterDef(String filterName); /** * Return the set of defined filters for this Context. */ public FilterDef[] findFilterDefs(); /** * Return the set of filter mappings for this Context. */ public FilterMap[] findFilterMaps(); /** * Return the set of InstanceListener classes that will be added to * newly created Wrappers automatically. */ public String[] findInstanceListeners(); /** * Return the MIME type to which the specified extension is mapped, * if any; otherwise return <code>null</code>. * * @param extension Extension to map to a MIME type */ public String findMimeMapping(String extension); /** * Return the extensions for which MIME mappings are defined. If there * are none, a zero-length array is returned. */ public String[] findMimeMappings(); /** * Return the value for the specified context initialization * parameter name, if any; otherwise return <code>null</code>. * * @param name Name of the parameter to return */ public String findParameter(String name); /** * Return the names of all defined context initialization parameters * for this Context. If no parameters are defined, a zero-length * array is returned. */ public String[] findParameters(); /** * For the given security role (as used by an application), return the * corresponding role name (as defined by the underlying Realm) if there * is one. Otherwise, return the specified role unchanged. * * @param role Security role to map */ public String findRoleMapping(String role); /** * Return <code>true</code> if the specified security role is defined * for this application; otherwise return <code>false</code>. * * @param role Security role to verify */ public boolean findSecurityRole(String role); /** * Return the security roles defined for this application. If none * have been defined, a zero-length array is returned. */ public String[] findSecurityRoles(); /** * Return the servlet name mapped by the specified pattern (if any); * otherwise return <code>null</code>. * * @param pattern Pattern for which a mapping is requested */ public String findServletMapping(String pattern); /** * Return the patterns of all defined servlet mappings for this * Context. If no mappings are defined, a zero-length array is returned. */ public String[] findServletMappings(); /** * Return the context-relative URI of the error page for the specified * HTTP status code, if any; otherwise return <code>null</code>. * * @param status HTTP status code to look up */ public String findStatusPage(int status); /** * Return the set of HTTP status codes for which error pages have * been specified. If none are specified, a zero-length array * is returned. */ public int[] findStatusPages(); /** * Return the tag library descriptor location for the specified taglib * URI, if any; otherwise, return <code>null</code>. * * @param uri URI, relative to the web.xml file */ public String findTaglib(String uri); /** * Return the URIs of all tag libraries for which a tag library * descriptor location has been specified. If none are specified, * a zero-length array is returned. */ public String[] findTaglibs(); /** * Return the set of watched resources for this Context. If none are * defined, a zero length array will be returned. */ public String[] findWatchedResources(); /** * Return <code>true</code> if the specified welcome file is defined * for this Context; otherwise return <code>false</code>. * * @param name Welcome file to verify */ public boolean findWelcomeFile(String name); /** * Return the set of welcome files defined for this Context. If none are * defined, a zero-length array is returned. */ public String[] findWelcomeFiles(); /** * Return the set of LifecycleListener classes that will be added to * newly created Wrappers automatically. */ public String[] findWrapperLifecycles(); /** * Return the set of ContainerListener classes that will be added to * newly created Wrappers automatically. */ public String[] findWrapperListeners(); /** * Reload this web application, if reloading is supported. * * @exception IllegalStateException if the <code>reloadable</code> * property is set to <code>false</code>. */ public void reload(); /** * Remove the specified application listener class from the set of * listeners for this application. * * @param listener Java class name of the listener to be removed */ public void removeApplicationListener(String listener); /** * Remove the application parameter with the specified name from * the set for this application. * * @param name Name of the application parameter to remove */ public void removeApplicationParameter(String name); /** * Remove the specified security constraint from this web application. * * @param constraint Constraint to be removed */ public void removeConstraint(SecurityConstraint constraint); /** * Remove the error page for the specified error code or * Java language exception, if it exists; otherwise, no action is taken. * * @param errorPage The error page definition to be removed */ public void removeErrorPage(ErrorPage errorPage); /** * Remove the specified filter definition from this Context, if it exists; * otherwise, no action is taken. * * @param filterDef Filter definition to be removed */ public void removeFilterDef(FilterDef filterDef); /** * Remove a filter mapping from this Context. * * @param filterMap The filter mapping to be removed */ public void removeFilterMap(FilterMap filterMap); /** * Remove a class name from the set of InstanceListener classes that * will be added to newly created Wrappers. * * @param listener Class name of an InstanceListener class to be removed */ public void removeInstanceListener(String listener); /** * Remove the MIME mapping for the specified extension, if it exists; * otherwise, no action is taken. * * @param extension Extension to remove the mapping for */ public void removeMimeMapping(String extension); /** * Remove the context initialization parameter with the specified * name, if it exists; otherwise, no action is taken. * * @param name Name of the parameter to remove */ public void removeParameter(String name); /** * Remove any security role reference for the specified name * * @param role Security role (as used in the application) to remove */ public void removeRoleMapping(String role); /** * Remove any security role with the specified name. * * @param role Security role to remove */ public void removeSecurityRole(String role); /** * Remove any servlet mapping for the specified pattern, if it exists; * otherwise, no action is taken. * * @param pattern URL pattern of the mapping to remove */ public void removeServletMapping(String pattern); /** * Remove the tag library location forthe specified tag library URI. * * @param uri URI, relative to the web.xml file */ public void removeTaglib(String uri); /** * Remove the specified watched resource name from the list associated * with this Context. * * @param name Name of the watched resource to be removed */ public void removeWatchedResource(String name); /** * Remove the specified welcome file name from the list recognized * by this Context. * * @param name Name of the welcome file to be removed */ public void removeWelcomeFile(String name); /** * Remove a class name from the set of LifecycleListener classes that * will be added to newly created Wrappers. * * @param listener Class name of a LifecycleListener class to be removed */ public void removeWrapperLifecycle(String listener); /** * Remove a class name from the set of ContainerListener classes that * will be added to newly created Wrappers. * * @param listener Class name of a ContainerListener class to be removed */ public void removeWrapperListener(String listener); /** * If enabled, requests for a web application context root will be * redirected (adding a trailing slash) by the Mapper. This is more * efficient but has the side effect of confirming that the context path is * valid. * * @param mapperContextRootRedirectEnabled Should the redirects be enabled? */ public void setMapperContextRootRedirectEnabled(boolean mapperContextRootRedirectEnabled); /** * Determines if requests for a web application context root will be * redirected (adding a trailing slash) by the Mapper. This is more * efficient but has the side effect of confirming that the context path is * valid. * * @return {@code true} if the Mapper level redirect is enabled for this * Context. */ public boolean getMapperContextRootRedirectEnabled(); /** * If enabled, requests for a directory will be redirected (adding a * trailing slash) by the Mapper. This is more efficient but has the * side effect of confirming that the directory is valid. * * @param mapperDirectoryRedirectEnabled Should the redirects be enabled? */ public void setMapperDirectoryRedirectEnabled(boolean mapperDirectoryRedirectEnabled); /** * Determines if requests for a directory will be redirected (adding a * trailing slash) by the Mapper. This is more efficient but has the * side effect of confirming that the directory is valid. * * @return {@code true} if the Mapper level redirect is enabled for this * Context. */ public boolean getMapperDirectoryRedirectEnabled(); /** * Are paths used in calls to obtain a request dispatcher expected to be * encoded? This affects both how Tomcat handles calls to obtain a request * dispatcher as well as how Tomcat generates paths used to obtain request * dispatchers internally. * * @param dispatchersUseEncodedPaths {@code true} to use encoded paths, * otherwise {@code false} */ public void setDispatchersUseEncodedPaths(boolean dispatchersUseEncodedPaths); /** * Are paths used in calls to obtain a request dispatcher expected to be * encoded? This applys to both how Tomcat handles calls to obtain a request * dispatcher as well as how Tomcat generates paths used to obtain request * dispatchers internally. * * @return {@code true} if encoded paths will be used, otherwise * {@code false} */ public boolean getDispatchersUseEncodedPaths(); }