org.apache.camel

Interface ConsumerTemplate

All Superinterfaces:

Service

All Known Implementing Classes:

DefaultConsumerTemplate

public interface ConsumerTemplate
extends Service

Template for working with Camel and consuming Message instances in an Exchange from an Endpoint.

This template is an implementation of the Polling Consumer EIP. This is not the Event Driven Consumer EIP.

The ConsumerTemplate is thread safe.

All methods throws RuntimeCamelException if consuming of the Exchange failed and an Exception occurred. The getCause method on RuntimeCamelException returns the wrapper original caused exception.

All the receiveBody methods will return the content according to this strategy

• throws RuntimeCamelException as stated above
• The fault.body if there is a fault message set and its not null
• The out.body if there is a out message set and its not null
• The in.body

Before using the template it must be started. And when you are done using the template, make sure to Service.stop() the template.

Important note on usage: See this FAQ entry before using, it applies to this ConsumerTemplate as well.

Version:

Method Summary

Methods

Modifier and Type	Method and Description
void	doneUoW(Exchange exchange) If you have used any of the receive methods which returns a Exchange type then you need to invoke this method when you are done using the returned Exchange.
CamelContext	getCamelContext() Get the CamelContext
int	getCurrentCacheSize() Gets an approximated size of the current cached resources in the backing cache pools.
int	getMaximumCacheSize() Gets the maximum cache size used.
Exchange	receive(Endpoint endpoint) Receives from the endpoint, waiting until there is a response.
Exchange	receive(Endpoint endpoint, long timeout) Receives from the endpoint, waiting until there is a response or the timeout occurs Important: See doneUoW(Exchange)
Exchange	receive(String endpointUri) Receives from the endpoint, waiting until there is a response Important: See doneUoW(Exchange)
Exchange	receive(String endpointUri, long timeout) Receives from the endpoint, waiting until there is a response or the timeout occurs Important: See doneUoW(Exchange)
Object	receiveBody(Endpoint endpoint) Receives from the endpoint, waiting until there is a response
<T> T	receiveBody(Endpoint endpoint, Class<T> type) Receives from the endpoint, waiting until there is a response
Object	receiveBody(Endpoint endpoint, long timeout) Receives from the endpoint, waiting until there is a response or the timeout occurs
<T> T	receiveBody(Endpoint endpoint, long timeout, Class<T> type) Receives from the endpoint, waiting until there is a response or the timeout occurs
Object	receiveBody(String endpointUri) Receives from the endpoint, waiting until there is a response
<T> T	receiveBody(String endpointUri, Class<T> type) Receives from the endpoint, waiting until there is a response
Object	receiveBody(String endpointUri, long timeout) Receives from the endpoint, waiting until there is a response or the timeout occurs
<T> T	receiveBody(String endpointUri, long timeout, Class<T> type) Receives from the endpoint, waiting until there is a response or the timeout occurs
Object	receiveBodyNoWait(Endpoint endpoint) Receives from the endpoint, not waiting for a response if non exists.
<T> T	receiveBodyNoWait(Endpoint endpoint, Class<T> type) Receives from the endpoint, not waiting for a response if non exists.
Object	receiveBodyNoWait(String endpointUri) Receives from the endpoint, not waiting for a response if non exists.
<T> T	receiveBodyNoWait(String endpointUri, Class<T> type) Receives from the endpoint, not waiting for a response if non exists.
Exchange	receiveNoWait(Endpoint endpoint) Receives from the endpoint, not waiting for a response if non exists.
Exchange	receiveNoWait(String endpointUri) Receives from the endpoint, not waiting for a response if non exists.
void	setMaximumCacheSize(int maximumCacheSize) Sets a custom maximum cache size.

Methods inherited from interface org.apache.camel.Service

start, stop

Method Detail

getCamelContext

CamelContext getCamelContext()

Get the CamelContext

Returns:

camelContext the Camel context

getMaximumCacheSize

int getMaximumCacheSize()

Gets the maximum cache size used.

Returns:

the maximum cache size

setMaximumCacheSize

void setMaximumCacheSize(int maximumCacheSize)

Sets a custom maximum cache size.

Parameters:

maximumCacheSize - the custom maximum cache size

getCurrentCacheSize

int getCurrentCacheSize()

Gets an approximated size of the current cached resources in the backing cache pools.

Returns:

the size of current cached resources

receive

Exchange receive(String endpointUri)

Receives from the endpoint, waiting until there is a response

Important: See doneUoW(Exchange)

Parameters:

endpointUri - the endpoint to receive from

Returns:

the returned exchange

receive

Exchange receive(Endpoint endpoint)

Receives from the endpoint, waiting until there is a response.

Important: See doneUoW(Exchange)

Parameters:

endpoint - the endpoint to receive from

Returns:

the returned exchange

See Also:

doneUoW(Exchange)

receive

Exchange receive(String endpointUri,
               long timeout)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Important: See doneUoW(Exchange)

Parameters:

endpointUri - the endpoint to receive from

timeout - timeout in millis to wait for a response

Returns:

the returned exchange, or null if no response

See Also:

doneUoW(Exchange)

receive

Exchange receive(Endpoint endpoint,
               long timeout)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Important: See doneUoW(Exchange)

Parameters:

endpoint - the endpoint to receive from

timeout - timeout in millis to wait for a response

Returns:

the returned exchange, or null if no response

See Also:

doneUoW(Exchange)

receiveNoWait

Exchange receiveNoWait(String endpointUri)

Receives from the endpoint, not waiting for a response if non exists.

Important: See doneUoW(Exchange)

Parameters:

endpointUri - the endpoint to receive from

Returns:

the returned exchange, or null if no response

receiveNoWait

Exchange receiveNoWait(Endpoint endpoint)

Receives from the endpoint, not waiting for a response if non exists.

Important: See doneUoW(Exchange)

Parameters:

endpoint - the endpoint to receive from

Returns:

the returned exchange, or null if no response

receiveBody

Object receiveBody(String endpointUri)

Receives from the endpoint, waiting until there is a response

Parameters:

endpointUri - the endpoint to receive from

Returns:

the returned response body

receiveBody

Object receiveBody(Endpoint endpoint)

Receives from the endpoint, waiting until there is a response

Parameters:

endpoint - the endpoint to receive from

Returns:

the returned response body

receiveBody

Object receiveBody(String endpointUri,
                 long timeout)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Parameters:

endpointUri - the endpoint to receive from

timeout - timeout in millis to wait for a response

Returns:

the returned response body, or null if no response

receiveBody

Object receiveBody(Endpoint endpoint,
                 long timeout)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Parameters:

endpoint - the endpoint to receive from

timeout - timeout in millis to wait for a response

Returns:

the returned response body, or null if no response

receiveBodyNoWait

Object receiveBodyNoWait(String endpointUri)

Receives from the endpoint, not waiting for a response if non exists.

Parameters:

endpointUri - the endpoint to receive from

Returns:

the returned response body, or null if no response

receiveBodyNoWait

Object receiveBodyNoWait(Endpoint endpoint)

Receives from the endpoint, not waiting for a response if non exists.

Parameters:

endpoint - the endpoint to receive from

Returns:

the returned response body, or null if no response

receiveBody

<T> T receiveBody(String endpointUri,
                Class<T> type)

Receives from the endpoint, waiting until there is a response

Parameters:

endpointUri - the endpoint to receive from

type - the expected response type

Returns:

the returned response body

receiveBody

<T> T receiveBody(Endpoint endpoint,
                Class<T> type)

Receives from the endpoint, waiting until there is a response

Parameters:

endpoint - the endpoint to receive from

type - the expected response type

Returns:

the returned response body

receiveBody

<T> T receiveBody(String endpointUri,
                long timeout,
                Class<T> type)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Parameters:

endpointUri - the endpoint to receive from

timeout - timeout in millis to wait for a response

type - the expected response type

Returns:

the returned response body, or null if no response

receiveBody

<T> T receiveBody(Endpoint endpoint,
                long timeout,
                Class<T> type)

Receives from the endpoint, waiting until there is a response or the timeout occurs

Parameters:

endpoint - the endpoint to receive from

timeout - timeout in millis to wait for a response

type - the expected response type

Returns:

the returned response body, or null if no response

receiveBodyNoWait

<T> T receiveBodyNoWait(String endpointUri,
                      Class<T> type)

Receives from the endpoint, not waiting for a response if non exists.

Parameters:

endpointUri - the endpoint to receive from

type - the expected response type

Returns:

the returned response body, or null if no response

receiveBodyNoWait

<T> T receiveBodyNoWait(Endpoint endpoint,
                      Class<T> type)

Receives from the endpoint, not waiting for a response if non exists.

Parameters:

endpoint - the endpoint to receive from

type - the expected response type

Returns:

the returned response body, or null if no response

doneUoW

void doneUoW(Exchange exchange)

If you have used any of the receive methods which returns a Exchange type then you need to invoke this method when you are done using the returned Exchange.

This is needed to ensure any Synchronization works is being executed. For example if you consumed from a file endpoint, then the consumed file is only moved/delete when you done the Exchange.

Note for all the other receive methods which does not return a Exchange type, the done has been executed automatic by Camel itself.

Parameters:

exchange - the exchange