com.loganlinn.pivotaltrackie.io.RemoteExecutor.java Source code

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Here is the source code for com.loganlinn.pivotaltrackie.io.RemoteExecutor.java

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/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.loganlinn.pivotaltrackie.io;

import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.content.ContentResolver;
import android.content.Context;
import android.net.ConnectivityManager;
import android.util.Log;

import com.loganlinn.pivotaltracker.PivotalTracker;
import com.loganlinn.pivotaltrackie.io.XmlHandler.HandlerException;
import com.loganlinn.pivotaltrackie.util.ParserUtils;

/**
 * Executes an {@link HttpUriRequest} and passes the result as an
 * {@link XmlPullParser} to the given {@link XmlHandler}.
 */
public class RemoteExecutor {
    private static final String TAG = "RemoteExecutor";

    private final HttpClient mHttpClient;
    private final ContentResolver mResolver;

    public RemoteExecutor(HttpClient httpClient, ContentResolver resolver) {
        mHttpClient = httpClient;
        mResolver = resolver;
    }

    /**
     * Execute a {@link HttpGet} request, passing a valid response through
     * {@link XmlHandler#parseAndApply(XmlPullParser, ContentResolver)}.
     * @throws ResponseException 
     */
    public void executeGet(String url, XmlHandler handler) throws HandlerException {

        execute(PivotalTracker.getGetRequest(url), handler); // get a
        // HttpRequest
        // object with
        // the token in
        // header
    }

    public void executePut(String url, XmlHandler handler) throws HandlerException {

        execute(PivotalTracker.getPutRequest(url), handler);
    }

    public void executePost(String url, XmlHandler handler) throws HandlerException {

        execute(PivotalTracker.getPostRequest(url), handler);
    }

    /**
     * Execute this {@link HttpUriRequest}, passing a valid response through
     * {@link XmlHandler#parseAndApply(XmlPullParser, ContentResolver)}.
     * @throws ResponseException 
     */
    public void execute(HttpUriRequest request, XmlHandler handler) throws HandlerException {
        Log.i(TAG, "Executing Remote " + request.getMethod() + " Request: " + request.getURI());

        try {
            // Execute the HttpRequest
            final HttpResponse resp = mHttpClient.execute(request);
            final int status = resp.getStatusLine().getStatusCode();
            Log.i(TAG, "Request Response: " + status);

            final boolean notFound = (status != HttpStatus.SC_NOT_FOUND);

            if (status != HttpStatus.SC_OK && !notFound) {
                throw new HandlerException(
                        "Unexpected server response " + resp.getStatusLine() + " for " + request.getRequestLine());
            }

            if (notFound) {
                final InputStream input = resp.getEntity().getContent();
                // Parse the input stream using the handler
                try {

                    final XmlPullParser parser = ParserUtils.newPullParser(input);
                    handler.parseAndApply(parser, mResolver);

                } catch (XmlPullParserException e) {
                    throw new HandlerException("Malformed response for " + request.getRequestLine(), e);
                } finally {
                    if (input != null)
                        input.close();
                }
            } else if (handler.getContentUri() != null) {
                Log.i(TAG, "Deleting " + handler.getContentUri().toString());
                mResolver.delete(handler.getContentUri(), null, null);
            }
        } catch (HandlerException e) {
            throw e;
        } catch (IOException e) {
            throw new HandlerException("Problem reading remote response for " + request.getRequestLine(), e);
        }
    }

}