com.appglu.impl.AppGluResponseErrorHandler.java Source code

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Here is the source code for com.appglu.impl.AppGluResponseErrorHandler.java

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/*******************************************************************************
 * Copyright 2013 AppGlu, 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.appglu.impl;

import java.io.IOException;

import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.converter.HttpMessageConversionException;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.client.DefaultResponseErrorHandler;

import com.appglu.AppGluHttpClientException;
import com.appglu.AppGluHttpIncompatibleClientVersionException;
import com.appglu.AppGluHttpInvalidUserSignupException;
import com.appglu.AppGluHttpNotFoundException;
import com.appglu.AppGluHttpServerException;
import com.appglu.AppGluHttpStatusCodeException;
import com.appglu.AppGluHttpUserUnauthorizedException;
import com.appglu.Error;
import com.appglu.ErrorCode;
import com.appglu.ErrorResponse;

public class AppGluResponseErrorHandler extends DefaultResponseErrorHandler {

    private HttpMessageConverter<Object> jsonMessageConverter;

    public AppGluResponseErrorHandler(HttpMessageConverter<Object> httpMessageConverter) {
        this.jsonMessageConverter = httpMessageConverter;
    }

    public void handleError(ClientHttpResponse response) throws IOException {
        HttpStatus statusCode = response.getStatusCode();

        Error error = this.readErrorFromResponse(response);

        if (statusCode == HttpStatus.NOT_FOUND) {
            throw new AppGluHttpNotFoundException(error);
        }

        if (error.getCode() == ErrorCode.APP_USER_UNAUTHORIZED) {
            throw new AppGluHttpUserUnauthorizedException(error);
        }

        if (error.getCode() == ErrorCode.APP_USER_USERNAME_ALREADY_USED) {
            throw new AppGluHttpInvalidUserSignupException(statusCode.value(), error);
        }

        if (error.getCode() == ErrorCode.INCOMPATIBLE_CLIENT_VERSION) {
            throw new AppGluHttpIncompatibleClientVersionException(error);
        }

        switch (statusCode.series()) {
        case CLIENT_ERROR:
            throw new AppGluHttpClientException(statusCode.value(), error);
        case SERVER_ERROR:
            throw new AppGluHttpServerException(statusCode.value(), error);
        default:
            throw new AppGluHttpStatusCodeException(statusCode.value(), error);
        }
    }

    private Error readErrorFromResponse(ClientHttpResponse response) throws IOException {
        try {
            ErrorResponse errorResponse = (ErrorResponse) jsonMessageConverter.read(ErrorResponse.class, response);
            return errorResponse.getError();
        } catch (HttpMessageConversionException e) {
            return new Error(ErrorCode.CANNOT_PARSE_RESPONSE_BODY, "Cannot parse response body");
        }
    }

}