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Spring Boot - RestTemplate PATCH request fix

  In Spring Boot, you make a simple http request as below: 1. Define RestTemplate bean @Bean public RestTemplate restTemplate () { return new RestTemplate (); } 2. Autowire RestTemplate wherever you need to make Http calls @Autowire private RestTemplate restTemplate ; 3. Use auto-wired RestTemplate to make the Http call restTemplate . exchange ( "http://localhost:8080/users" , HttpMethod . POST , httpEntity , String . class ); Above setup works fine for all Http calls except PATCH. The following exception occurs if you try to make a PATCH request as above Exception: I / O error on PATCH request for \ "http://localhost:8080/users\" : Invalid HTTP method: PATCH ; nested exception is java . net . ProtocolException : Invalid HTTP method: PATCH Cause: Above exception happens because of the HttpURLConnection used by default in Spring Boot RestTemplate which is provided by the standard JDK HTTP library. More on this at this  bug Fix: This can b...
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RADUS#4 - Caching the response in REST API's

  Caching in spring boot app: Caching can be used to provide a performance boost to your application users by avoiding the business logic processing involved again and again, load on your DB, requests to external systems if the users request data that's not changed frequently Different types of caching: We'll be focusing more on in-memory caching in this post i listed other options available to have an idea. In-memory caching You'll have a key-value data stores that stores the response of the request after it is served for the first time There are multiple systems like Redis, Memcached that do this distributed caching very well By default Spring provides concurrent hashmap as default cache, but you can override CacheManager to register external cache providers. Database caching Web server caching Dependencies needed: Maven < dependency > < groupId > org . springframework . boot </ groupId > < artifactId > spring - boot - starter - cache ...
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Set BIND VARIABLE and EXECUTE QUERY programmatically in ADF

A very common scenario in ADF is to set a bind variable and execute query programmatically within AMImpl/ VOImpl classes. Here's a simple way to do this: To set bind variable for all rowsets:       ViewObjectImpl someVO = this.getSomeViewObject();       VariableValueManager vMngr = someVO.ensureVariableManager();        vMngr.setVariableValue("DefinedBindVariable",value);        someVO,executeQuery(); To set bind variable for default rowset:          ViewObjectImpl someVO = this.getSomeViewObject();          someVO.setNamedWhereClauseParam("DefinedBindVariable",value);          someVO,executeQuery();
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