org.activiti.explorer.cache.UserCacheFactoryBean.java Source code

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Here is the source code for org.activiti.explorer.cache.UserCacheFactoryBean.java

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/* 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 org.activiti.explorer.cache;

import java.util.Collections;
import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.identity.User;
import org.activiti.explorer.Environments;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * Factory bean for creating the user-cache.
 * 
 * @author Frederik Heremans
 */
public class UserCacheFactoryBean implements FactoryBean<UserCache>, ApplicationContextAware {

    protected ApplicationContext applicationContext;

    protected String environment;

    protected UserCache userCache = null;

    public UserCache getObject() throws Exception {
        if (userCache == null) {
            initUserCache();
        }
        return userCache;
    }

    private void initUserCache() {
        if (environment.equals(Environments.ALFRESCO)) {
            userCache = new DummyUserCache(); // User cache is not needed in Alfresco since we hook in Alfresco's ID mgmt
        } else {
            userCache = new TrieBasedUserCache();

            // indentityService is not injected in this factory bean because 
            // we don't want to expose it in Alfresco context.xml. So we inject it manually here.
            ((TrieBasedUserCache) userCache).setIdentityService(applicationContext.getBean(IdentityService.class));
        }
    }

    public Class<?> getObjectType() {
        return UserCache.class;
    }

    public boolean isSingleton() {
        return true;
    }

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    public void setEnvironment(String environment) {
        this.environment = environment;
    }

    private class DummyUserCache implements UserCache {

        public List<User> findMatchingUsers(String prefix) {
            return Collections.emptyList();
        }

        public User findUser(String userId) {
            return null;
        }

        public void notifyUserDataChanged(String userId) {
        }

    }

}