DATADOC-88 re-introducing a MongoDbFactoryBean for configuring Mongo DB objects

spring-data-mongodb/src/main/java/org/springframework/data/document/mongodb/MongoDbFactoryBean.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright 2010-2011 the original author or authors.
+ *
+ * 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.springframework.data.document.mongodb;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.dao.DataAccessException;
+import org.springframework.util.Assert;
+
+import com.mongodb.DB;
+import com.mongodb.Mongo;
+
+/**
+ * Convenient factory for configuring MongoDB.
+ *
+ * @author Thomas Risberg
+ * @since 1.0
+ */
+public class MongoDbFactoryBean implements FactoryBean<DB>, InitializingBean {
+	//ToDo: add	PersistenceExceptionTranslator ???
+
+	/**
+	 * Logger, available to subclasses.
+	 */
+	protected final Log logger = LogFactory.getLog(getClass());
+
+	private Mongo mongo;
+	private String host;
+	private Integer port;
+	private String databaseName;
+	private String username;
+	private String password;
+	
+	public void setMongo(Mongo mongo) {
+		this.mongo = mongo;
+	}
+
+	public void setDatabaseName(String databaseName) {
+		this.databaseName = databaseName;
+	}
+
+	public void setHost(String host) {
+		this.host = host;
+	}
+
+	public void setPort(int port) {
+		this.port = port;
+	}
+
+	public void setUsername(String username) {
+		this.username = username;
+	}
+
+	public void setPassword(String password) {
+		this.password = password;
+	}
+
+	public DB getDb() throws DataAccessException {
+		Assert.notNull(mongo, "Mongo must not be null");
+		Assert.hasText(databaseName, "Database name must not be empty");
+		return MongoDbUtils.getDB(mongo, databaseName, username, password == null ? null : password.toCharArray());
+	}
+
+	public DB getObject() throws Exception {
+		return getDb();
+	}
+
+	public Class<? extends DB> getObjectType() {
+		return DB.class;
+	}
+
+	public boolean isSingleton() {
+		return false;
+	}
+
+	public void afterPropertiesSet() throws Exception {
+		// apply defaults - convenient when used to configure for tests 
+		// in an application context
+		//ToDo: do we need a default or should we require database name?
+		if (databaseName == null) {
+			logger.warn("Property databaseName not specified. Using default name 'test'");
+			databaseName = "test";
+		}
+		if (mongo == null) {
+			logger.warn("Property mongo not specified. Using default configuration");
+			if (host == null) {
+				mongo =  new Mongo();
+			}
+			else {
+				if (port == null) {
+					mongo = new Mongo(host);
+				}
+				else {
+					mongo = new Mongo(host, port);					
+				}
+			}
+		}
+	}
+
+}