java - Spring RestTemplate - passing in batches of GET requests -

i need query server links can obtained giving server reference.

lets have 10 references , want 10 links in 1 go in arraylist.

is below efficient way it? looks pretty resource intensive , takes approximately 4672ms generate

i looked @ docs resttemplate: http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/client/resttemplate.html#getforentity-java.lang.string-java.lang.class-java.util.map- there doesn't seem easier way want do.

arraylist<string> references = new arraylist<>(); arraylist<string> links = new arraylist<>(); resttemplate resttemplate = new resttemplate();  resttemplate.getmessageconverters().add(new stringhttpmessageconverter()); (int = 0; < 10; i++) {     responseentity<string> resource = resttemplate.getforentity(references.get(i), string.class);     links.add(resource.getbody().tostring()); } 

edit:

based on suggestions, have changed code i'm getting error: "asynchronous execution requires asynctaskexecutor set":

arraylist<string> references = new arraylist<>(); arraylist<string> links = new arraylist<>(); asyncresttemplate asyncresttemplate = new asyncresttemplate(new customclienthttprequestfactory());  resttemplate.getmessageconverters().add(new stringhttpmessageconverter()); (int = 0; < 10; i++) {     future<responseentity<string>> resource = asyncresttemplate.getforentity(references.get(i), string.class);     responseentity<string> entity = resource.get(); //this should start 10 threads links asynchronously     links.add(entity.getbody().tostring()); } 

i looked @ reference docs none of constructors allow me set both asynclistenabletaskexecutor , clienthttprequestfactory (the clienthttprequestfactory used - customclienthttprequestfactory extends simpleclienthttprequestfactory can redirect links successfully: http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/client/asyncresttemplate.html#asyncresttemplate--

here you're making rest calls sequentially - i.e. nothing done in parallel.

you use the asynchronous variant of resttemplate , make calls in parallel.