Fuse ESB Enterprise - Routing Expression and Predicate Languages

Variable Reference

Table of variables

Table 13 shows all of the variables supported by the simple language.

Table 13. Variables for the Simple Language

Variable	Type	Description
`exchangeId`	`String`	The exchange's ID value.
`id`	`String`	The In message ID value.
`body`	`Object`	The In message body. Supports OGNL expressions.
`in.body`	`Object`	The In message body. Supports OGNL expressions.
`out.body`	`Object`	The Out message body.
`bodyAs(Type)`	`Type`	The In message body, converted to the specified type. All types, `Type`, must be specified using their fully-qualified Java name, except for the types: `byte[]`, `String`, `Integer`, and `Long`. The converted body can be null.
`mandatoryBodyAs(Type)`	`Type`	The In message body, converted to the specified type. All types, `Type`, must be specified using their fully-qualified Java name, except for the types: `byte[]`, `String`, `Integer`, and `Long`. The converted body is expected to be non-null.
`header.``HeaderName`	`Object`	The In message's `HeaderName` header. Supports OGNL expressions.
`header[``HeaderName``]`	`Object`	The In message's `HeaderName` header (alternative syntax).
`headers.``HeaderName`	`Object`	The In message's `HeaderName` header.
`headers[``HeaderName``]`	`Object`	The In message's `HeaderName` header (alternative syntax).
`in.header.``HeaderName`	`Object`	The In message's `HeaderName` header. Supports OGNL expressions.
`in.header[``HeaderName``]`	`Object`	The In message's `HeaderName` header (alternative syntax).
`in.headers.``HeaderName`	`Object`	The In message's `HeaderName` header. Supports OGNL expressions.
`in.headers[``HeaderName``]`	`Object`	The In message's `HeaderName` header (alternative syntax).
`out.header.``HeaderName`	`Object`	The Out message's `HeaderName` header.
`out.header[``HeaderName``]`	`Object`	The Out message's `HeaderName` header (alternative syntax).
`out.headers.``HeaderName`	`Object`	The Out message's `HeaderName` header.
`out.headers[``HeaderName``]`	`Object`	The Out message's `HeaderName` header (alternative syntax).
`headerAs(Key,Type)`	`Type`	The `Key` header, converted to the specified type. All types, `Type`, must be specified using their fully-qualified Java name, except for the types: `byte[]`, `String`, `Integer`, and `Long`. The converted value can be null.
`headers`	`Map`	All of the In headers (as a `java.util.Map` type).
`in.headers`	`Map`	All of the In headers (as a `java.util.Map` type).
`property.``PropertyName`	`Object`	The `PropertyName` property on the exchange.
`property[``PropertyName``]`	`Object`	The `PropertyName` property on the exchange (alternative syntax).
`sys.``SysPropertyName`	`String`	The `SysPropertyName` Java system property.
`sysenv.``SysEnvVar`	`String`	The `SysEnvVar` system environment variable.
`exception`	`String`	Either the exception object from `Exchange.getException()` or, if this value is null, the caught exception from the `Exchange.EXCEPTION_CAUGHT` property; otherwise null. Supports OGNL expressions.
`exception.message`	`String`	If an exception is set on the exchange, returns the value of `Exception.getMessage()`; otherwise, returns `null`.
`exception.stacktrace`	`String`	If an exception is set on the exchange, returns the value of `Exception.getStackTrace()`; otherwise, returns `null`. Note: The simple language first tries to retrieve an exception from `Exchange.getException()`. If that property is not set, it checks for a caught exception, by calling `Exchange.getProperty(Exchange.CAUGHT_EXCEPTION)`.
`date:``command``:``pattern`	`String`	A date formatted using a java.text.SimpleDateFormat pattern. The following commands are supported: `now`, for the current date and time; `header.``HeaderName`, or `in.header.``HeaderName` to use a java.util.Date object in the `HeaderName` header from the In message; `out.header.``HeaderName` to use a java.util.Date object in the `HeaderName` header from the Out message;
`bean:beanID.Method`	`Object`	Invokes a method on the referenced bean and returns the result of the method invocation. To specify a method name, you can either use the `beanID.Method` syntax; or you can use the `beanID?method=``methodName` syntax.
`ref:beanID`	`Object`	Looks up the bean with the ID, `beanID`, in the registry and returns a reference to the bean itself. For example, if you are using the splitter EIP, you could use this variable to reference the bean that implements the splitting algorithm.
`properties:Key`	`String`	The value of the `Key` property placeholder (see Property Placeholders in Implementing Enterprise Integration Patterns).
`properties:Location:Key`	`String`	The value of the `Key` property placeholder, where the location of the properties file is given by `Location` (see Property Placeholders in Implementing Enterprise Integration Patterns).
`threadName`	`String`	The name of the current thread.

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