root / web_client / src / gr / grnet / pithos / web / client / rest / GetRequest.java @ 1ac430a1
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/*
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* Copyright (c) 2011 Greek Research and Technology Network
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*/
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package gr.grnet.pithos.web.client.rest; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.core.client.Scheduler.ScheduledCommand; |
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import com.google.gwt.http.client.Request; |
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import com.google.gwt.http.client.RequestBuilder; |
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import com.google.gwt.http.client.RequestException; |
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import com.google.gwt.http.client.Response; |
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import gr.grnet.pithos.web.client.foldertree.Resource; |
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import java.util.HashMap; |
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import java.util.Map; |
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public abstract class GetRequest<T extends Resource> implements ScheduledCommand { |
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private Class<T> aClass; |
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private String path; |
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private int okCode; |
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private String username; |
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private T cached;
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private T result;
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private Map<String, String> headers = new HashMap<String, String>(); |
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public abstract void onSuccess(T result); |
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public abstract void onError(Throwable t); |
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public GetRequest(Class<T> aClass, String path, int okCode, T result) { |
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this.aClass = aClass;
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this.path = path;
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this.okCode = okCode;
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this.result = result;
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} |
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public GetRequest(Class<T> aClass, String path) { |
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this(aClass, path, -1, null); |
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} |
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public GetRequest(Class<T> aClass, String path, T result) { |
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this(aClass, path, -1, result); |
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} |
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@Override
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public void execute() { |
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RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
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for (String header : headers.keySet()) |
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builder.setHeader(header, headers.get(header)); |
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try {
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builder.sendRequest("", new RestRequestCallback<T>(path, okCode) { |
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@Override
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public void onSuccess(T object) { |
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GetRequest.this.onSuccess(object); |
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} |
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@Override
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public T deserialize(Response response) {
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return Resource.createFromResponse(aClass, response, result);
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} |
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@Override
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public void onError(Request request, Throwable throwable) { |
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if (throwable instanceof RestException) { |
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if (((RestException) throwable).getHttpStatusCode() == 304 && cached != null){ |
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GWT.log("Using cache: " + cached.toString(), null); |
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onSuccess(cached); |
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return;
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} |
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} |
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GetRequest.this.onError(throwable); |
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} |
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}); |
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} |
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catch (RequestException e) {
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} |
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} |
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public void setHeader(String header, String value) { |
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headers.put(header, value); |
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} |
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} |