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You can have multiple functions in the same expression: "Hello ${in.header.name} this is ${in.header.me} speaking".
However you can not nest functions in Camel 2.8.x or older (i.e. having another ${ } placeholder in an existing, is not allowed).
From Camel 2.9 onwards you can nest functions.
Variables
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Variable | Type | Description |
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camelId | String | Camel |
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|| Variable || Type || Description ||
| camelId | String | *Camel * [] name |
| ** | Object | *Camel * |
| exchangeId | String | *Camel | exchangeId | String | Camel 2.3: |
| id | String | the input message id | body | Object | the input body | in.body | Object | the input body | body.OGNL | Object | Camel 2.3: the input body invoked using a Camel OGNL expression. | in.body.OGNL | Object | Camel 2.3: the input body invoked using a Camel OGNL expression. | bodyAs(type) | Type | Camel 2.3: Converts the body to the given type determined by its classname. The converted body can be null. | mandatoryBodyAs(type) | Type | Camel 2.5: Converts the body to the given type determined by its classname, and expects the body to be not null. | out.body | Object | the output body | header.foo | Object | refer to the input foo header | header[foo] | Object | Camel 2.9.2: refer to the input foo header | headers.foo | Object | refer to the input foo header | headers[foo] | Object | Camel 2.9.2: refer to the input foo header | in.header.foo | Object | refer to the input foo header | in.header[foo] | Object | Camel 2.9.2: refer to the input foo header | in.headers.foo | Object | refer to the input foo header | in.headers[foo] | Object | Camel 2.9.2: refer to the input foo header | header.foo[bar] | Object | Camel 2.3: regard input foo header as a map and perform lookup on the map with bar as key | in.header.foo[bar] | Object | Camel 2.3: regard input foo header as a map and perform lookup on the map with bar as key | in.headers.foo[bar] | Object | Camel 2.3: regard input foo header as a map and perform lookup on the map with bar as key | header.foo.OGNL | Object | Camel 2.3: refer to the input foo header and invoke its value using a Camel OGNL expression. | in.header.foo.OGNL | Object | Camel 2.3: refer to the input foo header and invoke its value using a Camel OGNL expression. | in.headers.foo.OGNL | Object | Camel 2.3: refer to the input foo header and invoke its value using a Camel OGNL expression. | out.header.foo | Object | refer to the out header foo | out.header[foo] | Object | Camel 2.9.2: refer to the out header foo | out.headers.foo | Object | refer to the out header foo | out.headers[foo] | Object | Camel 2.9.2: refer to the out header foo | headerAs(key,type) | Type | Camel 2.5: Converts the header to the given type determined by its classname | headers | Map | Camel 2.9: refer to the input headers | in.headers | Map | Camel 2.9: refer to the input headers | property.foo | Object | refer to the foo property on the exchange | property[foo] | Object | Camel 2.9.2: refer to the foo property on the exchange | property.foo.OGNL | Object | Camel 2.8: refer to the foo property on the exchange and invoke its value using a Camel OGNL expression. | sys.foo | String | refer to the system property | sysenv.foo | String | Camel 2.3: refer to the system environment | exception | Object | Camel 2.4: Refer to the exception object on the exchange, is null if no exception set on exchange. Will fallback and grab caught exceptions (Exchange.EXCEPTION_CAUGHT) if the Exchange has any. | exception.OGNL | Object | Camel 2.4: Refer to the exchange exception invoked using a Camel OGNL expression object | exception.message | String | Refer to the exception.message on the exchange, is null if no exception set on exchange. Will fallback and grab caught exceptions (Exchange.EXCEPTION_CAUGHT) if the Exchange has any. | exception.stacktrace | String | Camel 2.6. Refer to the exception.stracktrace on the exchange, is null if no exception set on exchange. Will fallback and grab caught exceptions (Exchange.EXCEPTION_CAUGHT) if the Exchange has any. | date:command:pattern | String | Date formatting using the java.text.SimpleDataFormat patterns. Supported commands are: now for current timestamp, in.header.xxx or header.xxx to use the Date object in the IN header with the key xxx. out.header.xxx to use the Date object in the OUT header with the key xxx. | bean:bean expression | Object | Invoking a bean expression using the Bean language. Specifying a method name you must use dot as separator. We also support the ?method=methodname syntax that is used by the Bean component. | properties:locations:key | String | Camel 2.3: Lookup a property with the given key. The locations option is optional. See more at Using PropertyPlaceholder. | routeId | String | Camel 2.11: Returns the id of the current route the Exchange is being routed. | threadName | String | Camel 2.3: Returns the name of the current thread. Can be used for logging purpose. | ref:xxx | Object | Camel 2.6: To lookup a bean from the Registry with the given id. | type:name.field | Object | Camel 2.11: To refer to a type or field by its FQN name. To refer to a field you can append .FIELD_NAME. For example you can refer to the constant field from Exchange as: org.apache.camel.Exchange.FILE_NAME |
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OGNL expression support
Available as of Camel 2.3
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