Page History

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<!DOCTYPE web-app
      PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
      "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
    <display-name>My Tapestry Application</display-name>
    <context-param>
        <param-name>tapestry.app-package</param-name>
        <param-value>org.example.myapp</param-value>
    </context-param>
    <filter>
        <filter-name>app</filter-name>
        <filter-class>org.apache.tapestry5.TapestryFilter</filter-class>
        <!-- Or org.apache.tapestry5.http.TapestryFilter if you're using tapestry-http without tapestry-core -->
    </filter>
    <filter-mapping>
        <filter-name>app</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

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tapestry.application-version

SymbolConstants.APPLICATION_VERSION – The version of the application, which is incorporated into URLs for context and classpath assets in Tapestry versions prior to 5.4. Assets may be compressed, and will have far-future expiration headers; they will be aggressively cached by the client web browser. You should change the application version on each new deployment of the application (that is, any time assets in the context change), to force clients to re-download changed versions of files. If you do not specify an application version, a random one will be assigned on every deployment (which is good for development but very bad for production).

tapestry.application-folder

SymbolConstants.APPLICATION_FOLDER – The folder, of the context, in which the Tapestry application executes. By default this is blank, meaning the Tapestry application executes in the root of the web application context. Setting this value allows the Tapestry application to be segregated into a folder, which can be useful when Tapestry is executed inside a web application with other servlets or filters.

tapestry.asset-url-fully-qualified

SymbolConstants.ASSET_URL_FULL_QUALIFIED – A boolean value to indicate whether asset URLs should be fully qualified in the rendered page. This defaults to false (not fully qualified).

tapestry.asset-path-prefix

SymbolConstants.ASSET_PATH_PREFIX – The prefix to be used for all asset paths. This should start and end with a slash ("/"). By default this is "/assets/".

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tapestry.bootstrap-root

SymbolConstants.BOOTSTRAP_ROOT – The root asset path for Twitter Bootstrap; if your application uses a modified version of Bootstrap, you can override this symbol to have Tapestry automatically use your version. The value should be a path to a folder (under "classpath:" or "context:") and should not include a trailing slash.

tapestry

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.font-awesome-root

SymbolConstants.CHARSETFONT_AWESOME_ROOT – The root asset path for FontAwesome; if your application uses a modified version of it, you can override this symbol to have Tapestry automatically use your version. The value should be a path to a folder (under "classpath:" or "context:") and should not include a trailing slash.

tapestry.charset

SymbolConstants.CHARSET – The character encoding used when generating output  – The character encoding used when generating output (or parsing input). The default is "UTF-8". See Content Type and Markup for more details.

tapestry.clustered-sessions

SymbolConstants.CLUSTERED_SESSIONS – If "true" then at the end of each request the SessionPersistedObjectAnalyzer will be called on each session persisted object that was accessed during the request. The default is "true", to preserve 5.2 behavior. For non-clustered applications (the majority), this value should be overridden to "false".

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tapestry.compact-json

SymbolConstants.COMPACT_JSON – If "true", then JSON page initialization content is compressed; if "false" then extra white space is added (pretty printing). Defaults to "true" in production mode.

tapestry.compatibility.unknown-component-id-check-enabled

SymbolConstants.UNKNOWN_COMPONENT_ID_CHECK_ENABLED – When enabled, Tapestry will check that component ids referenced in event handler method names (or the @OnEvent annotation) match up against components in the container's template. The default is true, but applications upgraded form Tapestry 5.2 may want to set this to false, to keep pages from failing due to the presence of such dead code.

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tapestry.module-path-prefix

SymbolConstants.MODULE_PATH_PREFIX – Prefix used for all module resources. This may contain slashes, but should not begin or end with one. Tapestry will create two Dispatchers from this: one for normal modules, the other for GZip compressed modules (by appending ".gz" to this value).

tapestry.context-path

SymbolConstants.CONTEXT_PATH – Identifies the context path of the application, as determined from ServletContext.getContextPath() method. This is either a blank string or a string that starts with a slash but does not end with one.

tapestry.datepicker

SymbolConstants.DATEPICKER – The path to the assets of the embedded DatePicker component

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tapestry.default-stylesheet

SymbolConstants.DEFAULT_STYLESHEET – In 5.3, this is the default stylesheet automatically injected into every rendered HTML page. Many Tapestry components assume that this stylesheet is available. All the classes defined in the stylesheet are prefixed with "t-". The exact contents of the stylesheet are subject to change at any time (they are considered internal), so replacing the stylesheet, rather than overriding selected rules within it, entails some risk.

The default is org/apache/tapestry5/default.css, stored on the classpath.

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Deprecated in 5.4 with no replacement. The stylesheet is now associated with the core JavaScriptStack.

tapestry.enable-html5-support

SymbolConstants.ENABLE_HTML5_SUPPORT – If "true", then certain HTML5 features are invoked by built-in Tapestry components. Mostly this controls whether the TextField component will emit HTML5 "type" attributes automatically when certain validators are used. See Forms and Validation for details. The default is false.

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Undeprecated in 5.5.0. The stylesheet defined by this symbol is needed when Tapestry is configured to not include Bootstrap at all.

tapestry.error-css-class

SymbolConstants.MINIFICATION_ENABLED – If "true", then resources (individually or when aggregated into stacks) will be minimized via the ResourceMinimizer service. If "false", then minification is disabled. The default is "true" in production mode, "false" otherwise.

Note that Tapestry's default implementation of ResourceMinimizer does nothing; minification is provided by add-on libraries. See Assets for details.

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ERROR_CSS_CLASS – Defines the CSS class that will be given to the HTML element generated by the Error component. If the value isn't help-block, the class attribute
will be help-block [symbol value]. The default value is help-block.

tapestry.enable-html5-support

SymbolConstantsaENABLE_PAGELOADING_MASK – If true, then when a page includes any JavaScript, a <script> block is added to insert a pageloader mask into the page to ensure that the user can't interact with the page until the page is fully initialized. The default is true.

tapestry.encode-locale-into-path

SymbolConstants.ENCODE_LOCALE_INTO_PATH – If "true" (the default), then the PersistentLocale will be encoded into URLs by the ComponentEventLinkEncoder service. If overridden to "false" this does not occur, but you should provide a LinkCreationListener2 (registered with the LinkCreationHub) in order to add the locale as a query parameter (or provide some alternate means of persisting the locale between requests). See Localization for more details on localization.

tapestry.exception-report-page

SymbolConstants.EXCEPTION_REPORT_PAGE – The name of the page used to report exceptions. This defaults to "ExceptionReport", a page that Tapestry provides. See Overriding Exception Reporting for details.

tapestry.exception-reports-dir

SymbolConstants.EXCEPTION_REPORTS_DIR – The root directory where Tapestry's built-in OperationTracker will create dated folders into which it writes exception report files. This is build/exceptions by default but should be overridden for production. See the related tapestry.restrictive-environment symbol below.

tapestry.execution-mode

SymbolConstants.EXECUTION_MODE – The execution mode. See Setting Execution Modes below.

tapestry.file-check-interval

SymbolConstants.ENABLE_HTML5_SUPPORT – If "true", then certain HTML5 features are invoked by built-in Tapestry components. Mostly this controls whether the TextField component will emit HTML5 "type" attributes automatically when certain validators are used. See Forms and Validation for details. The default is false.

tapestry.enable-minification

SymbolConstants.MINIFICATION_ENABLED – If "true", then resources (individually or when aggregated into stacks) will be minimized via the ResourceMinimizer service. If "false", then minification is disabled. The default is "true" in production mode, "false" otherwise.

Note that Tapestry's default implementation of ResourceMinimizer does nothing; minification is provided by add-on libraries. See Assets for details.

tapestry.enable-pageloading-mask

SymbolConstantsaENABLE_PAGELOADING_MASK – If true, then when a page includes any JavaScript, a <script> block is added to insert a pageloader mask into the page to ensure that the user can't interact with the page until the page is fully initialized. The default is true.

tapestry.encode-locale-into-path

SymbolConstants.ENCODE_LOCALE_INTO_PATH – If "true" (the default), then the PersistentLocale will be encoded into URLs by the ComponentEventLinkEncoder service. If overridden to "false" this does not occur, but you should provide a LinkCreationListener2 (registered with the LinkCreationHub) in order to add the locale as a query parameter (or provide some alternate means of persisting the locale between requests). See Localization for more details on localization.

tapestry.exception-report-page

SymbolConstants.EXCEPTION_REPORT_PAGE – The name of the page used to report exceptions. This defaults to "ExceptionReport", a page that Tapestry provides. See Overriding Exception Reporting for details.

tapestry.exception-reports-dir

SymbolConstants.EXCEPTION_REPORTS_DIR – The root directory where Tapestry's built-in OperationTracker will create dated folders into which it writes exception report files. This is build/exceptions by default but should be overridden for production. See the related tapestry.restrictive-environment symbol below.

tapestry.execution-mode

SymbolConstants.EXECUTION_MODE – The execution mode. See Setting Execution Modes below.

tapestry.file-check-interval

SymbolConstants.FILE_CHECK_INTERVAL – Time interval SymbolConstants.FILE_CHECK_INTERVAL – Time interval between file system checks. During a file system check, only a single thread is active (all others are blocked) and any files loaded are checked for changes (this is part of Tapestry's Class Reloading mechanism).

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tapestry.hostname

SymbolConstants.HOSTNAME – The hostname that application should use when constructing an absolute URL. The default is "", i.e. an empty string, in which case system will use request.getServerName(). Not the same as environment variable HOSTNAME (but you could contribute "$HOSTNAME" as the value to make it the same).

tapestry.hostport

SymbolConstants.HOSTPORT – The port that application should use when constructing an absolute URL. The default is "0", which means to use the port value from the request.

tapestry.hostport-secure

SymbolConstants.HOSTPORT_SECURE – The secure (https) port that application should use when constructing an absolute URL. The default is "0", i.e. use the value from the request.

tapestry.hmac-passphrase

SymbolConstants.HMAC_PASSPHRASE – The plaintext phrase used to set the key for HMAC securing of serialized object data. The default is blank, which causes a runtime alert and console error. You should set this to a reasonably unique, private value, and ensure (in a cluster) that all servers use the same value – typically by making a contribution in your applications module class (normally AppModule.java). See Security for details.

tapestry.include-core-stack

SymbolConstants.INCLUDE_CORE_STACK – Whether to include Tapestry's "core" stack of JavaScript libraries. The default is "true".

tapestry.javascript-infrastructure-provider

SymbolConstants.JAVASCRIPT_INFRASTRUCTURE_PROVIDER – Tapestry relies on an underlying client-side JavaScript infrastructure framework to handle DOM manipulation, event handling, and Ajax requests. Prior to Tapestry 5.4, the foundation was Prototype. In 5.4 and later, support for jQuery has been added, and it is possible to add others. This symbol defines a value that is used to select a resource that is provided to the ModuleManager service as a JavaScriptModuleConfiguration to provide a specific implementation of the t5/core/dom module. Tapestry 5.4 directly supports "prototype" or "jquery". To support other foundation frameworks, override this symbol value and supply your own module configuration.

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tapestry.lenient-date-format

SymbolConstants.LENIENT_DATE_FORMAT – When set to true, the DateField component will be lenient about date calculations, for example allowing a January 32 date as input and automatically converting it to February 1. When false (the default), only valid dates may be entered.

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SymbolConstants.OMIT_GENERATOR_META – If "true", then the <meta> tag that Tapestry normally writes into the <head>, identifying the Tapestry version, will be omitted. Use this when you do not wish to advertise your application's use of Tapestrythat Tapestry normally writes into the <head>, identifying the Tapestry version, will be omitted. Use this when you do not wish to advertise your application's use of Tapestry.

tapestry.page-pool.active-window

The time interval that an instantiated page instance may be cached before being removed. As pages are returned to the pool, they are time stamped. Periodically (as per the file check interval), the pool is scanned for page instances that have not been used recently; those that are outside the active window are discarded. This is used to free up unnecessary page instances after a request surge. Starting in 5.2, this is only effective if tapestry.page-pool-enabled is true.

The default is "10 m" (10 minutes; see Time Interval Formats).

tapestry.page-pool-enabled

Starting with Tapestry 5.2, page pooling has been turned off by default. This symbol lets you re-enable page pooling. Under most circumstances this symbol should not be set. The disabling of page pooling starting in 5.2 significantly reduces heap memory usage and improves performance for most web applications.

The default is "false".

tapestry.page-pool.hard-limit

The absolute maximum number of page instances (for a particular page name / locale combination) that Tapestry will create at any time. If this number is reached, then requests will fail because a page instance is not available ... this can happen as part of a denial of service attack. For this value to have any meaning, it should be lower than the number of threads that the servlet container is configured to use when processing requests.

The default is 20 page instances.

tapestry.page-pool.soft-limit

The number of pages in the page pool (for a given page name / locale combination) before which Tapestry will start to wait for existing pages to be made available. Under this limit of pages, Tapestry will simply create a new page instance if no existing instance is readily available. Once the soft limit is reached, Tapestry will wait a short period of time (the soft wait interval) to see if an existing page instance is made available. It will then create a new page instance (unless the hard limit has been reached).

The default is 5 page instances. Remember that page pooling is done separately for each page (and localization of the page).

tapestry.page-pool.

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soft-

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wait

The time interval that an instantiated Tapestry will wait for a page instance may be cached before being removed. As pages are returned to the pool, they are time stamped. Periodically (as per the file check interval), the pool is scanned for page instances that have not been used recently; those that are outside the active window are discarded. This is used to free up unnecessary page instances after a request surge. Starting in 5.2, this is only effective if tapestry.page-pool-enabled is true.

The default is "10 m" (10 minutes; see Time Interval Formats).

tapestry.page-pool-enabled

Starting with Tapestry 5.2, page pooling has been turned off by default. This symbol lets you re-enable page pooling. Under most circumstances this symbol should not be set. The disabling of page pooling starting in 5.2 significantly reduces heap memory usage and improves performance for most web applications.

The default is "false".

tapestry.page-pool.hard-limit

The absolute maximum number of page instances (for a particular page name / locale combination) that Tapestry will create at any time. If this number is reached, then requests will fail because a page instance is not available ... this can happen as part of a denial of service attack. For this value to have any meaning, it should be lower than the number of threads that the servlet container is configured to use when processing requests.

The default is 20 page instances.

tapestry.page-pool.soft-limit

The number of pages in the page pool (for a given page name / locale combination) before which Tapestry will start to wait for existing pages to be made available. Under this limit of pages, Tapestry will simply create a new page instance if no existing instance is readily available. Once the soft limit is reached, Tapestry will wait a short period of time (the soft wait interval) to see if an existing page instance is made available. It will then create a new page instance (unless the hard limit has been reached).

The default is 5 page instances. Remember that page pooling is done separately for each page (and localization of the page).

tapestry.page-pool.soft-wait

The time interval that Tapestry will wait for a page instance to become available before deciding whether to create an entirely new page instance.

The default is "10 ms" (10 milliseconds; see Time Interval Formats).

tapestry.page-preload-mode

SymbolConstants.PRELOADER_MODE – Controls in what environment page preloading should occur. By default, preloading only occurs in production. Possible values are "ALWAYS", "DEVELOPMENT", "NEVER", or "PRODUCTION" (the default is PRODUCTION when in production mode, or DEVELOPMENT otherwise). See PreloaderMode.

tapestry.persistence-strategy

SymbolConstants.PERSISTENCE_STRATEGY – Identifies the default persistence strategy for all pages that do not provide an override. The default is "session" (PersistenceConstants.SESSION).

tapestry.production-mode

SymbolConstants.PRODUCTION_MODE – A flag (true or false) indicating whether the application is running in production or in development. The default is true, which means that runtime exceptions are not reported with full detail (only the root exception message is displayed, not the entire stack of exceptions, properties and other information shown in development mode).

tapestry.restrictive-environment

SymbolConstants.RESTRICTIVE_ENVIRONMENT – A flag (true or false) that, if true, changes some default Tapestry behavior to make it work better in restrictive environments such as Google App Engine (GAE). Specifically, if true, then OperationsTracker writes its exception report files into a single folder (specified by the tapestry.exception-reports-dir symbol, above) rather than creating dated sub-folders under that path, and ResourceTransformerFactory avoids creating a cache folder for resources.

tapestry.secure-enabled

SymbolConstants.SECURE_ENABLED – If true, then @Secure annotations are honored; if false, no security checks or redirects take place. This defaults to tapestry.production-mode, meaning that in development mode it will (by default) be disabled. However, sites that are intended to be served only under HTTPS should set this to false. See HTTPS for details.

tapestry.secure-page

MetaDataConstants.SECURE_PAGE – If true, then the page may only be accessed via HTTPS. The @Secure annotation will set this value to true. This symbol is the default for all pages; set it to "true" to force the entire application to be secure. See HTTPS for details.

tapestry.service-reloading-enabled

If true (the default), then Tapestry IoC will attempt to reload service implementations when they change. This only applies to classes that Tapestry IoC instantiates itself, and have a known service interface (the container creates a proxy that, internally, can reload the implementation). Service reloading only works when the underlying class files are on the filesystem ... it is intended for development, not as an option in production.

This must be specified as a JVM system property. You may not set it in your module class.

tapestry.scriptaculous

SymbolConstants.SCRIPTACULOUS – The path to the embedded copy of script.aculo.us packaged with Tapestry. This value may be overridden to use a different version of the script.aculo.us library. See Legacy JavaScript for the default version.

tapestry.session-locking-enabled

SymbolConstants.SESSION_LOCKING_ENABLED – If true (the default), then Tapestry will use a lock when reading/updating HttpSession attributes, to avoid simultaneous access by multiple threads when using AJAX. See TAP5-2049. Set to false to deactivate the session locking logic.

Prior to version 5.4 session locking was not performed.

tapestry.start-page-name

SymbolConstants.START_PAGE_NAME – The logical name of the start page, the page that is rendered for the root URL. This is normally "start". This functionality is vestigial: it has been superseded by the use of Index pages.

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tapestry.strict-css-url-rewriting

SymbolConstants.STRICT_CSS_URL_REWRITING – Controls whether to throw an exception (true) or log a warning (false) when Tapestry encounters a URL reference to a non-existing file within a CSS file. The default is false.

tapestry.supported-locales

SymbolConstants.SUPPORTED_LOCALES – A comma-separated list of supported locales. Incoming requests as "narrowed" to one of these locales, based on closest match. If no match can be found, the first locale in the list is treated as the default.

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to become available before deciding whether to create an entirely new page instance.

The default is "10 ms" (10 milliseconds; see Time Interval Formats).

tapestry.page-preload-mode

SymbolConstants.PRELOADER_MODE – Controls in what environment page preloading should occur. By default, preloading only occurs in production. Possible values are "ALWAYS", "DEVELOPMENT", "NEVER", or "PRODUCTION" (the default is PRODUCTION when in production mode, or DEVELOPMENT otherwise). See PreloaderMode.

tapestry.persistence-strategy

SymbolConstants.PERSISTENCE_STRATEGY – Identifies the default persistence strategy for all pages that do not provide an override. The default is "session" (PersistenceConstants.SESSION).

tapestry.production-mode

SymbolConstants.PRODUCTION_MODE – A flag (true or false) indicating whether the application is running in production or in development. The default is true, which means that runtime exceptions are not reported with full detail (only the root exception message is displayed, not the entire stack of exceptions, properties and other information shown in development mode).

tapestry.restrictive-environment

SymbolConstants.RESTRICTIVE_ENVIRONMENT – A flag (true or false) that, if true, changes some default Tapestry behavior to make it work better in restrictive environments such as Google App Engine (GAE). Specifically, if true, then OperationsTracker writes its exception report files into a single folder (specified by the tapestry.exception-reports-dir symbol, above) rather than creating dated sub-folders under that path, and ResourceTransformerFactory avoids creating a cache folder for resources.

tapestry.secure-enabled

SymbolConstants.SECURE_ENABLED – If true, then @Secure annotations are honored; if false, no security checks or redirects take place. This defaults to tapestry.production-mode, meaning that in development mode it will (by default) be disabled. However, sites that are intended to be served only under HTTPS should set this to false. See HTTPS for details.

tapestry.secure-page

MetaDataConstants.SECURE_PAGE – If true, then the page may only be accessed via HTTPS. The @Secure annotation will set this value to true. This symbol is the default for all pages; set it to "true" to force the entire application to be secure. See HTTPS for details.

tapestry.service-reloading-enabled

If true (the default), then Tapestry IoC will attempt to reload service implementations when they change. This only applies to classes that Tapestry IoC instantiates itself, and have a known service interface (the container creates a proxy that, internally, can reload the implementation). Service reloading only works when the underlying class files are on the filesystem ... it is intended for development, not as an option in production.

This must be specified as a JVM system property. You may not set it in your module class.

tapestry.scriptaculous

SymbolConstants.SCRIPTACULOUS – The path to the embedded copy of script.aculo.us packaged with Tapestry. This value may be overridden to use a different version of the script.aculo.us library. See Legacy JavaScript for the default version.

tapestry.session-locking-enabled

SymbolConstants.SESSION_LOCKING_ENABLED – If true (the default), then Tapestry will use a lock when reading/updating HttpSession attributes, to avoid simultaneous access by multiple threads when using AJAX. See TAP5-2049. Set to false to deactivate the session locking logic.

Prior to version 5.4 session locking was not performed.

tapestry.start-page-name

SymbolConstants.START_PAGE_NAME – The logical name of the start page, the page that is rendered for the root URL. This is normally "start". This functionality is vestigial: it has been superseded by the use of Index pages.

tapestry.strict-css-url-rewriting

SymbolConstants.STRICT_CSS_URL_REWRITING – Controls whether to throw an exception (true) or log a warning (false) when Tapestry encounters a URL reference to a non-existing file within a CSS file. The default is false.

tapestry.supported-locales

SymbolConstants.SUPPORTED_LOCALES – A comma-separated list of supported locales. Incoming requests as "narrowed" to one of these locales, based on closest match. If no match can be found, the first locale in the list is treated as the default.

The default is (currently) "en,it,es,zh_CN,pt_PT,de,ru,hr,fi_FI,sv_SE,fr_FR,da,pt_BR,ja,el". As the community contributes new localizations of the necessary messages files, this list will expand. Note that the Tapestry quickstart archetype overrides the factory default, forcing the application to be localized only for "en".

tapestry.cors-enabled

SymbolConstants.CORS_ENABLED – Defines whether the CORS (Cross-Origing Resource Sharing) support should be enabled or not. Default value is false. If you set this to true,
you should also set at least Symbol.CORS_ALLOWED_ORIGINS too.

tapestry.cors-allowed-origins

SymbolConstants.CORS_ALLOWED_ORIGINS – Comma-delimited of origins allowed for CORS. The special value * means allowing all origins.  This is used by the default implementation of CorsHandlerHelper.getAllowedOrigin(HttpServletRequest). Default value is the empty string (i.e. no origins allowed and CORS actually disabled).

tapestry.cors-allow-credentials

SymbolConstants.CORS_ALLOW_CREDENTIALS – Boolean value defining whether the Access-Control-Allow-Credentials HTTP header should be set automatically in the response for CORS requests. Default value is false. This is used by the default implementation of CorsHandlerHelper.configureCredentials(HttpServletResponse).

tapestry.cors-allow-methods

SymbolConstants.CORS_ALLOW_METHODS – Value to be used in the Access-Control-Allow-Methods in CORS preflight request responses. This is used by the default implementation of CorsHandlerHelper.configureMethods(HttpServletResponse). Default value is GET,HEAD,PUT,PATCH,POST,DELETE.

tapestry.cors-allowed-headers

SymbolConstants.CORS_ALLOWED_HEADERS – Value to be used in the Access-Control-Allow-Headers in CORS preflight request responses. This is used by the default implementation of CorsHandlerHelper.configureAllowedHeaders(HttpServletResponse), which only sets the header if the value isn't empty. Default value is the empty string.

tapestry.cors-expose-headers

SymbolConstants.CORS_EXPOSE_HEADERS – Value to be used in the Access-Control-Expose-Headers in CORS preflight request responses. This is used by the default implementation of CorsHandlerHelper.configureExposeHeaders(HttpServletResponse), which only sets the header if the value isn't empty. Default value is the empty string.

tapestry.cors-max-age

SymbolConstants.CORS_MAX_AGE – Value to be used in the Access-Control-Max-Age in CORS preflight request responses. This is used by the default implementation of CorsHandlerHelper.configureMaxAge(HttpServletResponse), which only sets the header if the value isn't empty. Default value is the empty string.

tapestry.suppress-redirect-from-action-requests

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At this time, it is still not possible to run multiple Tapestry 5 applications within the same web application.