This guide includes the following sections:

Overview

This application programming interface (API) contains all the necessary operations for connecting to a cluster of one or more MigratoryData servers, subscribing to subjects, getting real-time messages for the subscribed subjects, and publishing real-time messages.

Before reading this manual, it is recommended to read MigratoryData Architecture Guide (PDF, HTML).

Creating Java clients for MigratoryData Server

A typical API usage is as follows:

Step 1 - Include the library

Import in your application the classes of this API as follows:

import com.migratorydata.client.*;

Also, include in the class-path of your application the API library migratorydata-client-java.jar located in the folder lib of this API package.

Step 2 - Define the listener for processing the real-time messages and status notifications

The listener should implement the MigratoryDataListener interface.

Use the API call MigratoryDataClient.setListener() to attach your listener implementation.

Step 3 - Specify the list of the MigratoryData servers where to connect to

Use the API method MigratoryDataClient.setServers() to specify a list of one or more MigratoryData servers to which the client will connect to. In fact, the client will connect to only one of the MigratoryData servers in this list. But, defining two or more MigratoryData servers is recommended in order to achieve load balancing and failover. Supposing the MigratoryData server – to which the client connected – goes down, then the API will automatically reconnect to another MigratoryData server in the list.

Step 4 Subscribe to subjects and publish messages

Use the API method MigratoryDataClient.subscribe() to subscribe to subjects and use the API method MigratoryDataClient.publish() to publish messages.

Step 5 - Handle the real-time messages and status notifications

Handle the messages received for the subscribed subjects as well as the status notifications in your listener implementation defined at Step 2 above.

Examples

Examples built with this API are available in the folder examples of this API package; start with the README file which explains how to compile and run them.