com.aipo.app.microblog.controller.JSONController.java Source code

Introduction

Here is the source code for com.aipo.app.microblog.controller.JSONController.java

Source

/*
 * This file is part of official Aipo App.
 * Copyright (C) 2011-2011 Aimluck,Inc.
 * http://www.aipo.com
 *
 * 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.aipo.app.microblog.controller;

import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.json.simple.JSONObject;
import org.slim3.controller.Navigation;
import org.slim3.controller.SimpleController;
import org.slim3.datastore.EntityNotFoundRuntimeException;

import com.google.appengine.api.datastore.DatastoreFailureException;
import com.google.appengine.api.datastore.DatastoreTimeoutException;
import com.google.appengine.repackaged.com.google.common.collect.Maps;
import com.google.apphosting.api.ApiProxy.CapabilityDisabledException;
import com.google.apphosting.api.DeadlineExceededException;

public abstract class JSONController extends SimpleController {

    private static final Logger logger = Logger.getLogger(JSONController.class.getName());

    public static final String STATUS = "status";

    public static final String ERROR_CODE = "errorCode";

    public static final String ERROR_MESSAGE = "errorMessage";

    public static final String CAN_RETRY = "canRetry";

    public static final String DATA = "data";

    protected abstract Map<String, Object> execute() throws Exception;

    @Override
    protected Navigation run() throws Exception {
        response.setContentType("application/json;");
        response.setCharacterEncoding("utf-8");

        Map<String, Object> handle = execute();
        if (handle.get(STATUS) == null) {
            handle.put(STATUS, 200);
        }

        JSONObject.writeJSONString(handle, response.getWriter());
        response.flushBuffer();
        return null;
    }

    @Override
    protected Navigation handleError(Throwable error) throws Throwable {
        logger.log(Level.WARNING, error.getMessage(), error);
        Map<String, Object> map = Maps.newHashMap();
        String errorCode;
        String errorMessage;
        int status = 500;
        boolean canRetry = false;
        if (error instanceof CapabilityDisabledException) {
            errorCode = "READONLY";
            errorMessage = "???";
        } else if (error instanceof DatastoreTimeoutException) {
            errorCode = "DSTIMEOUT";
            errorMessage = "??????";
            canRetry = true;
        } else if (error instanceof DatastoreFailureException) {
            errorCode = "DSFAILURE";
            errorMessage = "??????";
        } else if (error instanceof DeadlineExceededException) {
            errorCode = "DEE";
            errorMessage = "??????";
            canRetry = true;
        } else if (error instanceof EntityNotFoundRuntimeException) {
            status = 400;
            errorCode = "NOTFOUND";
            errorMessage = "????????";
            canRetry = true;
        } else {
            errorCode = "UNKNOWN";
            errorMessage = "??????";
        }
        map.put(STATUS, status);
        map.put(ERROR_CODE, errorCode);
        map.put(ERROR_MESSAGE, errorMessage);
        map.put(CAN_RETRY, canRetry);
        JSONObject.writeJSONString(map, response.getWriter());
        response.flushBuffer();
        return null;
    }

    protected String getViewerId() {
        return request.getParameter("opensocial_owner_id");
    }

}