org.syncope.client.validation.SyncopeClientErrorHandler.java Source code

Introduction

Here is the source code for org.syncope.client.validation.SyncopeClientErrorHandler.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.syncope.client.validation;

import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.commons.lang.ArrayUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.syncope.types.SyncopeClientExceptionType;

public class SyncopeClientErrorHandler extends DefaultResponseErrorHandler {

    public static final String EXCEPTION_TYPE_HEADER = "ExceptionType";

    /**
     * Logger.
     */
    private static final Logger LOG = LoggerFactory.getLogger(SyncopeClientErrorHandler.class);

    public static final HttpStatus[] MANAGED_STATUSES = new HttpStatus[] { HttpStatus.BAD_REQUEST,
            HttpStatus.NOT_FOUND };

    @Override
    public void handleError(final ClientHttpResponse response) throws IOException {

        if (!ArrayUtils.contains(MANAGED_STATUSES, response.getStatusCode())) {
            super.handleError(response);
        }

        List<String> exceptionTypesInHeaders = response.getHeaders().get(EXCEPTION_TYPE_HEADER);
        if (exceptionTypesInHeaders == null) {
            LOG.debug("No " + EXCEPTION_TYPE_HEADER + " provided");

            return;
        }

        SyncopeClientCompositeErrorException compositeException = new SyncopeClientCompositeErrorException(
                response.getStatusCode());

        Set<String> handledExceptions = new HashSet<String>();
        for (String exceptionTypeAsString : exceptionTypesInHeaders) {
            SyncopeClientExceptionType exceptionType = null;
            try {
                exceptionType = SyncopeClientExceptionType.getFromHeaderValue(exceptionTypeAsString);
            } catch (IllegalArgumentException e) {
                LOG.error("Unexpected value of " + EXCEPTION_TYPE_HEADER + ": " + exceptionTypeAsString, e);
            }
            if (exceptionType != null) {
                handledExceptions.add(exceptionTypeAsString);

                SyncopeClientException clientException = new SyncopeClientException();
                clientException.setType(exceptionType);
                if (response.getHeaders().get(exceptionType.getElementHeaderName()) != null
                        && !response.getHeaders().get(exceptionType.getElementHeaderName()).isEmpty()) {

                    clientException.setElements(response.getHeaders().get(exceptionType.getElementHeaderName()));
                }

                compositeException.addException(clientException);
            }
        }

        exceptionTypesInHeaders.removeAll(handledExceptions);
        if (!exceptionTypesInHeaders.isEmpty()) {
            LOG.error("Unmanaged exceptions: " + exceptionTypesInHeaders);
        }

        if (compositeException.hasExceptions()) {
            throw compositeException;
        }
    }
}