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159 lines (143 loc) · 5.55 KB
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package com.ab;
import jersey.repackaged.com.google.common.util.concurrent.FutureCallback;
import jersey.repackaged.com.google.common.util.concurrent.Futures;
import jersey.repackaged.com.google.common.util.concurrent.ListenableFuture;
import org.apache.commons.codec.digest.DigestUtils;
import org.glassfish.jersey.server.ManagedAsync;
import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import javax.ws.rs.*;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
import javax.ws.rs.core.*;
import java.util.Collection;
/**
* @author Arpit Bhardwaj
*/
@Path("/books")
public class BookResource {
@Context
Request request;
@Context BookDao bookDao;
//BookDao bookDao = new BookDao();
/*@GET
@Produces(MediaType.APPLICATION_JSON)
public Collection<Book> getBooks(){
return bookDao.getBooks();
}*/
@GET
//@Produces({MediaType.APPLICATION_JSON,MediaType.APPLICATION_XML})
@Produces({"application/json;qs=1","application/xml;qs=0.5"})
@ManagedAsync
public void getBooks(@Suspended final AsyncResponse response){
//response.resume(bookDao.getBooks());
ListenableFuture<Collection<Book>> listenableFuture = bookDao.getBooksAsync();
Futures.addCallback(listenableFuture, new FutureCallback<Collection<Book>>() {
@Override
public void onSuccess(Collection<Book> books) {
response.resume(books);
}
@Override
public void onFailure(Throwable throwable) {
response.resume(throwable);
}
});
}
/*@Path("/{id}")
@GET
@Produces(MediaType.APPLICATION_JSON)
public Book getBook(@PathParam("id") String id){
return bookDao.getBook(id);
}*/
@Path("/{id}")
@GET
//@Produces({MediaType.APPLICATION_JSON,MediaType.APPLICATION_XML})
@Produces({"application/json;qs=1","application/xml;qs=0.5"})
@ManagedAsync
public void getBook(@PathParam("id") String id,@Suspended final AsyncResponse response){
//response.resume(bookDao.getBook(id));
ListenableFuture<Book> listenableFuture = bookDao.getBookAsync(id);
Futures.addCallback(listenableFuture, new FutureCallback<Book>() {
@Override
public void onSuccess(Book book) {
//response.resume(book);
EntityTag entityTag = generateEntityTag(book);
Response.ResponseBuilder responseBuilder = request.evaluatePreconditions(entityTag);
if (responseBuilder != null){
response.resume(responseBuilder.build()); //304 Response
}else{
response.resume(Response.ok().tag(entityTag).entity(book).build());
}
}
@Override
public void onFailure(Throwable throwable) {
response.resume(throwable);
}
});
}
/*@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Book addBook(Book book){
return bookDao.addBook(book);
}*/
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@ManagedAsync
public void addBook(@Valid @NotNull Book book, @Suspended final AsyncResponse response){
//response.resume(bookDao.addBook(book));
ListenableFuture<Book> listenableFuture = bookDao.addBookAsync(book);
Futures.addCallback(listenableFuture, new FutureCallback<Book>() {
@Override
public void onSuccess(Book addedBook) {
response.resume(addedBook);
}
@Override
public void onFailure(Throwable throwable) {
response.resume(throwable);
}
});
}
@Path("/{id}")
@PATCH
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@ManagedAsync
public void updateBook(@PathParam("id") final String id, final Book book, @Suspended final AsyncResponse response){
//response.resume(bookDao.addBook(book));
ListenableFuture<Book> getBookFuture = bookDao.getBookAsync(id);
Futures.addCallback(getBookFuture, new FutureCallback<Book>() {
@Override
public void onSuccess(Book originalBook) {
EntityTag entityTag = generateEntityTag(originalBook);
Response.ResponseBuilder responseBuilder = request.evaluatePreconditions(entityTag);
if (responseBuilder != null){
response.resume(responseBuilder.build()); //304 Response
}else{
ListenableFuture<Book> bookFuture = bookDao.updateBookAsync(id,book);
Futures.addCallback(bookFuture, new FutureCallback<Book>() {
@Override
public void onSuccess(Book updatedBook) {
response.resume(updatedBook);
}
@Override
public void onFailure(Throwable throwable) {
response.resume(throwable);
}
});
}
}
@Override
public void onFailure(Throwable throwable) {
response.resume(throwable);
}
});
}
EntityTag generateEntityTag(Book book){
return new EntityTag(DigestUtils.md5Hex(book.getAuthor()
+book.getTitle()
+book.getPublished()
+book.getExtras()));
}
}