Package org.apache.tapestry5.http
Class TapestryHttpSymbolConstants
java.lang.Object
org.apache.tapestry5.http.TapestryHttpSymbolConstants
Class defining constants for Tapestry HTTP symbols.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final String
Version number of the application.static final String
The charset used when rendering page markup; the charset is also used as the request encoding when handling incoming requests.static final String
If "true" then at the end of each request theSessionPersistedObjectAnalyzer
will be called on each session persisted object that was accessed during the request.static final String
Identifies the context path of the application, as determined fromServletContext.getContextPath()
.static final String
Boolean value defining whether the Access-Control-Allow-Credentials HTTP header should be set automatically in the response for CORS requests.static final String
Value to be used in the Access-Control-Allow-Methods in CORS preflight request responses.static final String
Value to be used in the Access-Control-Allow-Headers in CORS preflight request responses.static final String
Comma-delimited of origins allowed for CORS.static final String
Defines whether the CORS (Cross-Origing Resource Sharing) support should be enabled or not.static final String
Value to be used in the Access-Control-Expose-Headers in CORS preflight request responses.static final String
Value to be used in the Access-Control-Max-Age in responses to preflight CORS requests.static final String
A comma separated list of execution modes used to control how the application is initialized.static final String
If "true" (the default) then GZip compression is enabled for dynamic requests and for static assets.static final String
The hostname that application should use when constructing an absolute URL.static final String
The hostport that application should use when constructing an absolute URL.static final String
The secure (https) hostport that application should use when constructing an absolute URL.static final String
Minimum output stream size, in bytes, before output is compressed using GZIP.static final String
Indicates whether Tapestry is running in production mode or developer mode.static final String
If true (the default), then Tapestry will apply locking semantics around access to theHttpSession
.static final String
The version number of the core Tapestry framework, or UNKNOWN if the version number is not available (which should only occur when developing Tapestry). -
Constructor Summary
Constructors -
Method Summary
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Field Details
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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 can also contribute "$HOSTNAME" as the value to make it the same as the environment variable HOSTNAME.- Since:
- 5.3
- See Also:
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HOSTPORT
The hostport that application should use when constructing an absolute URL. The default is "0", i.e. use the port value from the request.- Since:
- 5.3
- See Also:
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HOSTPORT_SECURE
The secure (https) hostport that application should use when constructing an absolute URL. The default is "0", i.e. use the value from the request. This is an alias toHOSTPORT_SECURE
.- Since:
- 5.3
- See Also:
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CLUSTERED_SESSIONS
If "true" then at the end of each request theSessionPersistedObjectAnalyzer
will be called on each session persisted object that was accessed during the request. This is provided as a performance enhancement for servers that do not use clustered sessions. The default istrue
, to preserve 5.2 behavior. For non-clustered applications (the majority), this value should be overridden tofalse
. A future release of Tapestry may change the default.- Since:
- 5.3
- See Also:
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SESSION_LOCKING_ENABLED
If true (the default), then Tapestry will apply locking semantics around access to theHttpSession
. Reading attribute names occurs with a shared read lock; getting or setting an attribute upgrades to an exclusive write lock. This can tend to serialize threads when a number of simultaneous (Ajax) requests from the client arrive ... however, many implementations of HttpSession are not thread safe, and often mutable objects are stored in the session and shared between threads. Leaving this on the default will yield a more robust application; setting it to false may speed up processing for more Ajax intensive applications (but care should then be given to ensuring that objects shared inside the session are themselves immutable or thread-safe).- Since:
- 5.4
- See Also:
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APPLICATION_VERSION
Version number of the application. Prior to 5.4, this version number was integrated into asset URLs. Starting with 5.4, a checksum of the individual asset's content is used instead, and this version number is only used for documentation purposes; it appears in the default exception report page, for example. The default value is "0.0.1". In 5.3 and earlier, the default value was a random hexadecimal string.- Since:
- 5.1.0.0
- See Also:
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PRODUCTION_MODE
Indicates whether Tapestry is running in production mode or developer mode. This affects a large number of Tapestry behaviors related to performance and security, including how exceptions are reported, whether far-future expire headers are emitted, whether JavaScript files may be combined, whether JSON is compressed, whether component field and parameter values are shadowed to instance variables (to assist with debugging), and more.- See Also:
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TAPESTRY_VERSION
The version number of the core Tapestry framework, or UNKNOWN if the version number is not available (which should only occur when developing Tapestry).- See Also:
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CONTEXT_PATH
Identifies the context path of the application, as determined fromServletContext.getContextPath()
. This is either a blank string or a string that starts with a slash but does not end with one.- Since:
- 5.4
- See Also:
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EXECUTION_MODE
A comma separated list of execution modes used to control how the application is initialized. Each modes can contribute a list (comma separated) of Module classes to be loaded during startup, the order in which they appear is preserved. The default value is:production
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CHARSET
The charset used when rendering page markup; the charset is also used as the request encoding when handling incoming requests. The default is "UTF-8".- See Also:
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MIN_GZIP_SIZE
Minimum output stream size, in bytes, before output is compressed using GZIP. Shorter streams are not compressed. Tapestry buffers this amount and switches to a GZIP output stream as needed. The default is "100".- Since:
- 5.1.0.0
- See Also:
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GZIP_COMPRESSION_ENABLED
If "true" (the default) then GZip compression is enabled for dynamic requests and for static assets. If you are using a server that handles GZip compression for you, or you don't want to use the extra processing power necessary to GZIP requests, then override this to "false".- Since:
- 5.1.0.0
- See Also:
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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 setCORS_ALLOWED_ORIGINS
.- Since:
- 5.8.2
- See Also:
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CORS_ALLOWED_ORIGINS
Comma-delimited of origins allowed for CORS. The special value "*" means allowing all origins. This is used by the default implementation ofCorsHandlerHelper.getAllowedOrigin(javax.servlet.http.HttpServletRequest)
. Default value is the empty string (i.e. no origins allowed and CORS actually disabled).- Since:
- 5.8.2
- See Also:
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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 isfalse
. This is used by the default implementation ofCorsHandlerHelper.configureCredentials(javax.servlet.http.HttpServletResponse)
.- Since:
- 5.8.2
- See Also:
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CORS_ALLOW_METHODS
Value to be used in the Access-Control-Allow-Methods in CORS preflight request responses. This is used byCorsHandlerHelper.configureMethods(javax.servlet.http.HttpServletResponse)
. Default value isGET,HEAD,PUT,PATCH,POST,DELETE
.- Since:
- 5.8.2
- See Also:
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CORS_ALLOWED_HEADERS
Value to be used in the Access-Control-Allow-Headers in CORS preflight request responses. This is used byCorsHandlerHelper.configureAllowedHeaders(javax.servlet.http.HttpServletResponse, javax.servlet.http.HttpServletRequest)
, which only sets the header if the value isn't empty. Default value is the empty string.- Since:
- 5.8.2
- See Also:
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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 ofCorsHandlerHelper.configureExposeHeaders(javax.servlet.http.HttpServletResponse)
, which only sets the header if the value isn't empty. Default value is the empty string.- Since:
- 5.8.2
- See Also:
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CORS_MAX_AGE
Value to be used in the Access-Control-Max-Age in responses to preflight CORS requests. This is used byCorsHandlerHelper.configureMaxAge(javax.servlet.http.HttpServletResponse)
, which only sets the header if the value isn't empty. Default value is the empty string. This is an alias forCORS_MAX_AGE
.- Since:
- 5.8.2
- See Also:
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Constructor Details
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TapestryHttpSymbolConstants
public TapestryHttpSymbolConstants()
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