MongoDB——JDBC

    下面是最近项目中用的针对于MongoDB数据库封装的JDBC，先做一个大概的了解，关于用法，下一篇博文将详细介绍

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import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoDatabase;

public class MongoJdbc {
	/** 客户端连接池 */
	private static MongoClient mongoClient;
	/** 线程安全的数据库链接 */
	private static MongoDatabase mongoDatabase = null;
	/** 服务器信息 */
	private String repset;
	/** 数据库信息 */
	private String database;
	/** 用户名 */
	private String user;
	/** 密码 */
	private String password;
	/** 单个host允许链接的最大链接数 */
	private String connectionsPerHost;
	/** 线程队列数 */
	private String threadsAllowedToBlockForConnectionMultiplier;

	public void setRepset(String repset) {
		this.repset = repset;
	}

	public void setDatabase(String database) {
		this.database = database;
	}

	public void setUser(String user) {
		this.user = user;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public void setConnectionsPerHost(String connectionsPerHost) {
		this.connectionsPerHost = connectionsPerHost;
	}

	public void setThreadsAllowedToBlockForConnectionMultiplier(String threadsAllowedToBlockForConnectionMultiplier) {
		this.threadsAllowedToBlockForConnectionMultiplier = threadsAllowedToBlockForConnectionMultiplier;
	}

	private void init() {
		List<ServerAddress> serverAddressList = new ArrayList<ServerAddress>();
		if (this.repset == null || "".equals(this.repset)) {
			throw new MongodbException("未配置ip地址和端口号！");
		}
		if (this.connectionsPerHost == null || "".equals(this.connectionsPerHost)) {
			throw new MongodbException("未配置单个host允许链接的最大链接数！");
		}
		if (this.threadsAllowedToBlockForConnectionMultiplier == null || "".equals(this.threadsAllowedToBlockForConnectionMultiplier)) {
			throw new MongodbException("未配置线程队列数！");
		}
		if (this.user == null || "".equals(this.user)) {
			throw new MongodbException("未配置用户名！");
		}
		if (this.password == null || "".equals(this.password)) {
			throw new MongodbException("未配置密码！");
		}
		if (this.database == null || "".equals(this.database)) {
			throw new MongodbException("未配置库名！");
		}
		String[] hostPorts = this.repset.split(",");
		for (int i = 0; i < hostPorts.length; i++) {
			String[] hostPortArr = hostPorts[i].split(":");
			if (hostPortArr.length != 2) {
				throw new MongodbException("mongodb主机配置异常");
			}
			String host = hostPortArr[0];
			String port = hostPortArr[1];
			ServerAddress serverAddress = new ServerAddress(host, Integer.parseInt(port));
			serverAddressList.add(serverAddress);
		}
		MongoClientOptions mongoClientOptions = new MongoClientOptions.Builder().connectionsPerHost(Integer.parseInt(this.connectionsPerHost))
				.threadsAllowedToBlockForConnectionMultiplier(Integer.parseInt(this.threadsAllowedToBlockForConnectionMultiplier)).build();
		MongoCredential credential = MongoCredential.createCredential(this.user, this.database, this.password.toCharArray());
		mongoClient = new MongoClient(serverAddressList, Arrays.asList(credential), mongoClientOptions);
		mongoDatabase = mongoClient.getDatabase(database);
	}

	public MongoDatabase getMongodb() {
		if (null == mongoDatabase) {
			init();
		}
		return mongoDatabase;
	}
}
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