Spring boot: Handling mongodb timeoutException - mongodb

Question

When Mongodb is down, the spring boot application is down. I wish to handle exception of connectiontimeout and log the error without stopping application.
When finding an item from database is failed because the connection is not possible, the application should do another treatment like calling web service to find data.
Did you have any idea about this ?
Configuration
spring.data.mongodb.uri=mongodb://${MONGODB_DB_HOST}:${MONGODB_DB_PORT}/${MONGODB_DB_DATABASE}?connectTimeoutMS=${mongodb.connection.timeout}

Answer 1

I have used below code to configure mongodb connection in spring boot
you can specify socket timeout and connection timeout according to your need.
#Configuration
public class DatabaseConfiguration {
private static final Logger LOGGER = LoggerFactory.getLogger(DatabaseConfiguration.class);
#Value("${spring.data.mongodb.uri}")
private String mongoUri;
#Value("${spring.data.mongodb.database}")
private String mongoDbName;
#Value("${spring.data.mongodb.host}")
private String host;
#Value("${spring.data.mongodb.port}")
private int port;
#Value("${spring.data.mongodb.username}")
private String username;
#Value("${spring.data.mongodb.password}")
private String password;
#Bean
public MongoTemplate mongoTemplate() {
LOGGER.debug(" instantiating MongoDbFactory ");
SimpleMongoDbFactory mongoDbFactory = new SimpleMongoDbFactory(mongoClient(), mongoDbName);
MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory);
return mongoTemplate;
}
#Bean
public MongoClient mongoClient() {
List<ServerAddress> servers = new ArrayList<ServerAddress>();
servers.add(new ServerAddress(host, port));
MongoClientOptions mongoClientOptions = MongoClientOptions.builder()
.connectionsPerHost(10)
.socketTimeout(2000)
.connectTimeout(2000)
.build();
if (Utils.isNotEmpty(username) && Utils.isNotEmpty(password)) {
List<MongoCredential> creds = new ArrayList<MongoCredential>();
creds.add(MongoCredential.createCredential(username, mongoDbName, password.toCharArray()));
return new MongoClient(servers,creds, mongoClientOptions);
} else
return new MongoClient(servers, mongoClientOptions);
}
#Bean
public MongoClientURI mongoClientURI() {
LOGGER.debug(" creating connection with mongodb with uri [{}] ", mongoUri);
return new MongoClientURI(mongoUri);
}
}
Define below properties in your application.yml file
mongodb specific properties
spring:
data:
mongodb:
database: dbname
host: localhost
port: 27017
username: dbusername
password: dbpassword

Answer 2

You can use the below sample example to configure mongodb timeout. I hope it's easy to convert to bean annonation for springboot. Else you can import the resource bean (#ImportResource)
<beans>
<mongo:mongo host="localhost" port="27017">
<mongo:options connections-per-host="8"
threads-allowed-to-block-for-connection-multiplier="4"
connect-timeout="1000"
max-wait-time="1500}"
auto-connect-retry="true"
socket-keep-alive="true"
socket-timeout="1500"
slave-ok="true"
write-number="1"
write-timeout="0"
write-fsync="true"/>
</mongo:mongo/>
</beans>