io.macgyver.mongodb.MongoDBServiceFactory.java Source code

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Here is the source code for io.macgyver.mongodb.MongoDBServiceFactory.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 io.macgyver.mongodb;

import io.macgyver.core.ConfigurationException;
import io.macgyver.core.service.ServiceDefinition;
import io.macgyver.core.service.ServiceFactory;
import io.macgyver.core.service.ServiceRegistry;

import java.net.UnknownHostException;
import java.util.Properties;
import java.util.Set;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.stereotype.Component;

import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.mongodb.DB;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;

@Component
public class MongoDBServiceFactory extends ServiceFactory<MongoClient> {

    public MongoDBServiceFactory() {
        super("mongodb");
    }

    public Object doCreateInstance(ServiceDefinition def) {
        Properties props = def.getProperties();
        try {
            return new ExtendedMongoClient(new MongoClientURI(injectCredentials(props.getProperty("uri"),
                    props.getProperty("username"), props.getProperty("password"))));
        } catch (UnknownHostException e) {
            throw new ConfigurationException(e);
        }
    }

    public class ExtendedMongoClient extends MongoClient {

        MongoClientURI mongoClientUri;

        public ExtendedMongoClient(MongoClientURI uri) throws UnknownHostException {
            super(uri);
            this.mongoClientUri = uri;

        }

        public String getDatabaseName() {
            return mongoClientUri.getDatabase();
        }
    }

    public String injectCredentials(String uri, String username, String password) {
        Preconditions.checkNotNull(uri);
        Preconditions.checkArgument(uri.startsWith("mongodb://"), "mongo uri must start with mongodb://");
        if (!Strings.isNullOrEmpty(username) && !Strings.isNullOrEmpty(password)) {
            if (uri.contains("@")) {
                throw new IllegalArgumentException(
                        "mongo uri must not contain credentials if you are injecting them");
            }
            uri = uri.replace("mongodb://", "mongodb://" + username + ":" + password + "@");
            return uri;

        } else {
            return uri;
        }
    }

    public static class DBFactoryShim implements FactoryBean<DB> {

        MongoClient client;

        DBFactoryShim(MongoClient client) {
            this.client = client;
        }

        @Override
        public DB getObject() throws Exception {

            ExtendedMongoClient extendedMongoClient = (ExtendedMongoClient) client;
            return extendedMongoClient.getDB(extendedMongoClient.getDatabaseName());
        }

        @Override
        public Class<?> getObjectType() {
            return DB.class;
        }

        @Override
        public boolean isSingleton() {
            return true;
        }

    }

    @Override
    protected void doCreateCollaboratorInstances(ServiceRegistry registry, ServiceDefinition primaryDefinition,
            Object primaryBean) {

        ExtendedMongoClient c = (ExtendedMongoClient) primaryBean;
        DB db = c.getDB(c.getDatabaseName());
        MongoTemplate template = new MongoTemplate(db.getMongo(), c.getDatabaseName());

        registry.registerCollaborator(primaryDefinition.getName() + "DB", db);
        registry.registerCollaborator(primaryDefinition.getName() + "Template", template);

    }

    @Override
    public void doCreateCollaboratorDefinitions(Set<ServiceDefinition> defSet, ServiceDefinition def) {
        ServiceDefinition dbDef = new ServiceDefinition(def.getName() + "DB", def.getName(), def.getProperties(),
                this);
        defSet.add(dbDef);
    }
}