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You can define a URL mapping to a set of operations as shown in the API_1 definition, or you can define separate mappings for separate operations as shown in API_2. Also note the last resource definition in API_3, which does not specify a URL mapping nor a URI template. This is called the default resource of the API. Each API can have at most one default resource. Any request received by the API that does not match any of the enclosed resource definitions will be dispatched to the default resource of the API. In the case of API_3, a DELETE request on the URL “/payments” will be dispatched to the default resource as none of the other resources in API_3 are configured to handle DELETE requests.
For a comprehensive example of using REST APIs with the ESB, see the article How to GET a Cup of Coffee the WSO2 Way.
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Adding APIs in the Management Console
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