com.meltmedia.dropwizard.mongo.junit.MongoRule.java Source code

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Here is the source code for com.meltmedia.dropwizard.mongo.junit.MongoRule.java

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/**
 * Copyright (C) 2014 meltmedia (christian.trimble@meltmedia.com)
 *
 * 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.meltmedia.dropwizard.mongo.junit;

import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

import com.mongodb.MongoClient;

/**
 * A JUnit Rule for creating a mongo client. This rule is designed to be used as
 * a ClassRule.
 * 
 * @author Christian Trimble
 */
public class MongoRule implements TestRule {
    MongoClient mongoClient;
    String host;
    int port;

    public MongoRule(String host, int port) {
        this.host = host;
        this.port = port;
    }

    /**
     * Return an instance of the mongo client when this rule is in effect.
     * 
     * @return
     */
    public MongoClient getClient() {
        return mongoClient;
    }

    /**
     * Wraps the provided statement with code to create and then clean up a
     * MongoClient object.
     */
    @Override
    public Statement apply(final Statement statement, final Description description) {
        return new Statement() {
            @Override
            public void evaluate() throws Throwable {
                try {
                    mongoClient = new MongoClient(host, port);
                    statement.evaluate();
                } finally {
                    if (mongoClient != null) {
                        try {
                            mongoClient.close();
                        } catch (Exception e) {
                        }
                        mongoClient = null;
                    }
                }
            }
        };
    }
}