adding initial GridFS integration.

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/GridFsTemplateAutoConfiguration.java

+package org.springframework.boot.autoconfigure.mongo;
+
+import com.mongodb.Mongo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.mongodb.MongoDbFactory;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
+import org.springframework.data.mongodb.gridfs.GridFsTemplate;
+import org.springframework.util.StringUtils;
+
+/**
+ * <P>
+ * {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration Auto-configuration} for
+ * Mongo's {@link com.mongodb.gridfs.GridFS Grid FS} Spring Data's
+ * {@link org.springframework.data.mongodb.gridfs.GridFsTemplate GridFsTemplate}.
+ *
+ * <p>
+ * You can override which GridFS database is used by specifying {@code spring.data.mongodb.gridFsDatabase},
+ * otherwise it defaults to the general {@code spring.data.mongodb.database} parameter.
+ *
+ * @author Josh Long
+ */
+@Configuration
+@ConditionalOnClass({Mongo.class, GridFsTemplate.class})
+@EnableConfigurationProperties(MongoProperties.class)
+@AutoConfigureAfter(MongoTemplateAutoConfiguration.class)
+public class GridFsTemplateAutoConfiguration {
+
+    @Autowired
+    private MongoProperties mongoProperties;
+
+    @Bean
+    @ConditionalOnMissingBean
+    public MongoDbFactory mongoDbFactory(Mongo mongo) throws Exception {
+
+        String db = StringUtils.hasText(this.mongoProperties.getGridFsDatabase()) ?
+                this.mongoProperties.getGridFsDatabase() : this.mongoProperties.getMongoClientDatabase() ;
+
+        return new SimpleMongoDbFactory(mongo, db );
+    }
+
+    @Bean
+    @ConditionalOnMissingBean
+    public GridFsTemplate gridFsTemplate(MongoDbFactory mongoDbFactory,
+                                         MongoTemplate mongoTemplate) {
+        return new GridFsTemplate(mongoDbFactory, mongoTemplate.getConverter());
+    }
+
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/MongoProperties.java

@@ -16,19 +16,19 @@
 
 package org.springframework.boot.autoconfigure.mongo;
 
-import java.net.UnknownHostException;
-
-import org.springframework.boot.context.properties.ConfigurationProperties;
-
 import com.mongodb.DBPort;
 import com.mongodb.MongoClient;
 import com.mongodb.MongoClientURI;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+import java.net.UnknownHostException;
 
 /**
  * Configuration properties for Mongo.
  *
  * @author Dave Syer
  * @author Phillip Webb
+ * @author Josh Long
  */
 @ConfigurationProperties(prefix = "spring.data.mongodb")
 public class MongoProperties {
@@ -41,6 +41,9 @@ public class MongoProperties {
 
     private String database;
 
+    private String gridFsDatabase;
+
+
     public String getHost() {
         return this.host;
     }
@@ -73,6 +76,14 @@ public class MongoProperties {
         this.port = port;
     }
 
+    public String getGridFsDatabase() {
+        return gridFsDatabase;
+    }
+
+    public void setGridFsDatabase(String gridFsDatabase) {
+        this.gridFsDatabase = gridFsDatabase;
+    }
+
     public String getMongoClientDatabase() {
         if (this.database != null) {
             return this.database;

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/GridFsTemplateAutoConfigurationTests.java

+package org.springframework.boot.autoconfigure.mongo;
+
+
+import org.junit.After;
+import org.junit.Test;
+import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.gridfs.GridFsTemplate;
+
+import static org.junit.Assert.assertEquals;
+
+public class GridFsTemplateAutoConfigurationTests {
+
+    private AnnotationConfigApplicationContext context;
+
+    @After
+    public void close() {
+        if (this.context != null) {
+            this.context.close();
+        }
+    }
+
+    @Test
+    public void templateExists() {
+        this.context = new AnnotationConfigApplicationContext(
+                PropertyPlaceholderAutoConfiguration.class, MongoAutoConfiguration.class,
+                MongoTemplateAutoConfiguration.class , GridFsTemplateAutoConfiguration.class);
+        assertEquals(1, this.context.getBeanNamesForType(GridFsTemplate.class).length);
+    }
+}