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Android/Java client library for the Pathfinder service
package xyz.thepathfinder.android;
import javax.websocket.CloseReason;
import javax.websocket.ContainerProvider;
import javax.websocket.DeploymentException;
import javax.websocket.WebSocketContainer;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* The Pathfinder class is the main entry point to the Pathfinder API. To create the Pathfinder class you need
* a valid application identifier provided from your Pathfinder service manager, we provide the ability to get
* an application identifier from thepathfinder.xyz. The connection also
* requires a JWT in the form of a String to authenticate the user. The URI to your pathfinder provider is also
* required to initiate the connection.
*
*
*
* The default cluster is available via the {@link #getDefaultCluster} method. Any other cluster available to
* the user may be obtained through the {@link #getCluster(String)} method, where the path is of the form
* "/default/clusterName/subclusterName/subsubclusterName".
*
*
*
* Note, when connecting thePathfinder object the thread is blocked until the web socket to the
* Pathfinder service is opened.
*
*
* Pathfinder pathfinder = new Pathfinder("myAppId", "UserJWT");
* pathfinder.connect();
* Cluster cluster = pathfinder.getCluster("/default/cluster1/subcluster2");
* MyClusterListener clusterListener = new MyClusterListener();
* cluster.addListener(clusterListener);
* cluster.connect();
* {@literal // more code ...}
* pathfinder.close();
*
* @author David Robinson
* @version 0.0.1
* @see Cluster
* @see Commodity
* @see Transport
*/
public class Pathfinder {
/**
* Cluster model name used in requests to the Pathfinder server.
*/
protected static String CLUSTER = "Cluster";
/**
* Commodity model name used in requests to the Pathfinder server.
*/
protected static String COMMODITY = "Commodity";
/**
* Transport model name used in requests to the Pathfinder server.
*/
protected static String TRANSPORT = "Vehicle";
//TODO revert after transport update on pathfinder-server
//protected static String TRANSPORT = "Transport";
/**
* Keeps track of all the Pathfinder models and connection to the server.
*/
private PathfinderServices services;
/**
* URL to the Pathfinder server being connected to.
*/
private URI webSocketUrl;
/**
* Logs all messages
*/
private static Logger logger = Logger.getLogger(Pathfinder.class.getName());
/**
* Constructs a Pathfinder object.
*
* @param applicationIdentifier application Identifier provided by a Pathfinder service provider
* @param userCredentials JWT of the user's credentials
*/
public Pathfinder(String applicationIdentifier, String userCredentials) {
try {
this.webSocketUrl = new URI("ws://api.thepathfinder.xyz/socket");
} catch(URISyntaxException e) {
logger.severe(e.getMessage());
}
ModelRegistry registry = new ModelRegistry();
Connection connection = new Connection(applicationIdentifier, userCredentials, registry);
this.services = new PathfinderServices(registry, connection);
}
/**
* Constructs a Pathfinder object.
*
* @param applicationIdentifier application Identifier provided by a Pathfinder service provider
* @param userCredentials JWT of the user's credentials
* @param webSocketUrl URL to the Pathfinder web socket service provider
*/
protected Pathfinder(String applicationIdentifier, String userCredentials, URI webSocketUrl) {
this.webSocketUrl = webSocketUrl;
ModelRegistry registry = new ModelRegistry();
Connection connection = new Connection(applicationIdentifier, userCredentials, registry);
this.services = new PathfinderServices(registry, connection);
}
/**
* Establishes a connection to the Pathfinder server, if the connection is not already open.
* This method blocks until the connection is established.
*
* @throws IOException problem connecting the Pathfinder server
*/
public void connect() throws IOException {
if (!this.isConnected()) {
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
try {
// blocks until connection is established, JSR 356
container.connectToServer(this.services.getConnection(), this.webSocketUrl);
} catch (DeploymentException e) {
logger.severe(e.getMessage()); // Invalid annotated connection object
} catch (IOException e) {
logger.severe(e.getMessage());
throw e;
}
}
}
/**
* Gets an unconnected cluster pointing to the default cluster for the application identifier provided.
*
* @return an unconnected cluster
*/
public Cluster getDefaultCluster() {
return Cluster.getInstance(Path.DEFAULT_PATH, this.services);
}
/**
* Gets an unconnected cluster pointing to the path specified.
*
* @param path to the cluster
* @return an unconnected cluster
*/
public Cluster getCluster(String path) {
return Cluster.getInstance(path, this.services);
}
/**
* Gets an unconnected commodity pointing to the path specified.
*
* @param path to the commodity
* @return an unconnected commodity
*/
public Commodity getCommodity(String path) {
return Commodity.getInstance(path, this.services);
}
/**
* Gets an unconnected transport pointing to the path specified.
*
* @param path to the transport
* @return an unconnected transport
*/
public Transport getTransport(String path) {
return Transport.getInstance(path, this.services);
}
/**
* Returns true if the web socket connection to the Pathfinder server is open.
*
* @return true if the connection is still open
*/
public boolean isConnected() {
return this.services.getConnection().isConnected();
}
/**
* Returns the number of web socket messages sent to the Pathfinder server.
*
* @return The number of web socket messages sent
*/
protected long getSentMessageCount() {
return this.services.getConnection().getSentMessageCount();
}
/**
* Returns the number of web socket messages received from the Pathfinder server.
*
* @return The number of web socket messsages received.
*/
protected long getReceivedMessageCount() {
return this.services.getConnection().getReceivedMessageCount();
}
/**
* Closes the web socket connection to the Pathfinder server with a normal close condition.
*
* @throws IOException If there was error closing the connection.
*/
public void close() throws IOException {
CloseReason reason = new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, "Connection ended by user");
this.close(reason);
}
/**
* Closes the web socket connection to the Pathfinder server, if it is still open, with the specified reason.
*
* @param reason The reason to close the connection.
* @throws IOException If there was error closing the connection.
*/
public void close(CloseReason reason) throws IOException {
if (this.isConnected()) {
logger.finest("Connection closed");
this.services.getConnection().close(reason);
}
}
}