com.saasovation.collaboration.port.adapter.service.HttpUserInRoleAdapter.java Source code

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Here is the source code for com.saasovation.collaboration.port.adapter.service.HttpUserInRoleAdapter.java

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//   Copyright 2012,2013 Vaughn Vernon
//
//   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.saasovation.collaboration.port.adapter.service;

import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

import com.saasovation.collaboration.domain.model.collaborator.Collaborator;
import com.saasovation.collaboration.domain.model.tenant.Tenant;

public class HttpUserInRoleAdapter implements UserInRoleAdapter {

    private static final String HOST = "localhost";
    private static final String PORT = "8081";
    private static final String PROTOCOL = "http";
    private static final String URL_TEMPLATE = "/idovation/tenants/{tenantId}/users/{username}/inRole/{role}";

    private final RestTemplate restTemplate = new RestTemplate();

    public HttpUserInRoleAdapter() {
        super();
    }

    public <T extends Collaborator> T toCollaborator(Tenant aTenant, String anIdentity, String aRoleName,
            Class<T> aCollaboratorClass) {

        T collaborator = null;

        try {
            ResponseEntity<String> response = restTemplate.getForEntity(this.buildURLFor(URL_TEMPLATE),
                    String.class, aTenant.id(), anIdentity, aRoleName);

            if (response.getStatusCodeValue() == 200) {
                collaborator = new CollaboratorTranslator().toCollaboratorFromRepresentation(response.getBody(),
                        aCollaboratorClass);
            } else if (response.getStatusCodeValue() == 204) {
                // not an error, return null
            } else {
                throw new IllegalStateException("There was a problem requesting the user: " + anIdentity
                        + " in role: " + aRoleName + " with resulting status: " + response.getStatusCode());
            }

        } catch (Throwable t) {
            throw new IllegalStateException("Failed because: " + t.getMessage(), t);
        }

        return collaborator;
    }

    private String buildURLFor(String aTemplate) {
        String url = PROTOCOL + "://" + HOST + ":" + PORT + aTemplate;

        return url;
    }
}