Examples of de.zib.scalaris.PubSub

de.zib.scalaris.PubSub
ink #publish(String,String)}sc.publish(otpTopic, otpContent); // {@link #publish(OtpErlangString,OtpErlangString)}
For the full example, see {@link de.zib.scalaris.examples.PubSubPublishExample}

Subscribing to topics
```
  String topic; String URL; OtpErlangString otpTopic; OtpErlangString otpURL; TransactionSingleOp sc = new PubSub(); sc.subscribe(topic, URL);       //  {@link #subscribe(String,String)}sc.subscribe(otpTopic, otpURL); //  {@link #subscribe(OtpErlangString,OtpErlangString)} 
```
For the full example, see {@link de.zib.scalaris.examples.PubSubSubscribeExample}

Unsubscribing from topics
Unsubscribing from topics works like subscribing to topics with the exception of a {@link NotFoundException} being thrown if either the topic does notexist or the URL is not subscribed to the topic.
```
  String topic; String URL; OtpErlangString otpTopic; OtpErlangString otpURL; TransactionSingleOp sc = new PubSub(); sc.unsubscribe(topic, URL);       //  {@link #unsubscribe(String,String)}sc.unsubscribe(otpTopic, otpURL); //  {@link #unsubscribe(OtpErlangString,OtpErlangString)} 
```
Getting a list of subscribers to a topic
```
  String topic; OtpErlangString otpTopic; List<String> subscribers; OtpErlangList otpSubscribers; // non-static: TransactionSingleOp sc = new PubSub(); subscribers = sc.getSubscribers(topic).stringListValue();             //  {@link #getSubscribers(String)}otpSubscribers = (OtpErlangList) sc.getSubscribers(otpTopic).value(); //  {@link #getSubscribers(OtpErlangString)} 
```
For the full example, see {@link de.zib.scalaris.examples.PubSubGetSubscribersExample}

Connection errors
Errors when setting up connections or trying to send/receive RPCs will be handed to the {@link ConnectionPolicy} that has been set when the connectionwas created. By default, {@link ConnectionFactory} uses{@link DefaultConnectionPolicy} which implements automatic connection-retriesby classifying nodes as good or bad depending on their previous state. The number of automatic retries is adjustable (default: 3). @author Nico Kruber, kruber@zib.de @version 3.4 @since 2.5


        System.out.println("Reading values with the class `PubSub`:");


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out
                    .println("    `OtpErlangList getSubscribers(OtpErlangString)`...");
            otpSubscribers = (OtpErlangList) sc.getSubscribers(otpTopic).value();
            System.out.println("      getSubscribers(" + otpTopic.stringValue()
                    + ") == " + getSubscribers(otpSubscribers));
        } catch (final ConnectionException e) {
            System.out.println("      getSubscribers(" + otpTopic.stringValue()
                    + ") failed: " + e.getMessage());
        } catch (final UnknownException e) {
            System.out.println("    getSubscribers(" + otpTopic.stringValue()
                    + ") failed: " + e.getMessage());
        }


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out
                    .println("    `List<String> getSubscribers(String)`...");
            subscribers = sc.getSubscribers(topic).stringListValue();
            System.out.println("      getSubscribers(" + topic + ") == "
                    + getSubscribers(subscribers));
        } catch (final ConnectionException e) {
            System.out.println("      getSubscribers(" + topic + ") failed: "
                    + e.getMessage());

View Full Code Here

        System.out
                .println("Subscribing a URL to a topic with the class `PubSub`:");


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out
                    .println("    `void subscribe(OtpErlangString, OtpErlangString)`...");
            sc.subscribe(otpTopic, otpURL);
            System.out.println("      subscribe(" + otpTopic.stringValue()
                    + ", " + otpURL.stringValue() + ") succeeded");
        } catch (final ConnectionException e) {
            System.out.println("      subscribe(" + otpTopic.stringValue()
                    + ", " + otpURL.stringValue() + ") failed: "
                    + e.getMessage());
        } catch (final TimeoutException e) {
            System.out.println("      subscribe(" + otpTopic.stringValue()
                    + ", " + otpURL.stringValue() + ") failed with timeout: "
                    + e.getMessage());
        } catch (final AbortException e) {
            System.out.println("      subscribe(" + otpTopic.stringValue()
                    + ", " + otpURL.stringValue() + ") failed with abort: "
                    + e.getMessage());
        } catch (final UnknownException e) {
            System.out.println("      subscribe(" + otpTopic.stringValue()
                    + ", " + otpURL.stringValue() + ") failed with unknown: "
                    + e.getMessage());
        }


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out.println("    `void subscribe(String, String)`...");
            sc.subscribe(topic, URL);
            System.out.println("      subscribe(" + topic + ", " + URL
                    + ") succeeded");
        } catch (final ConnectionException e) {
            System.out.println("      subscribe(" + topic + ", " + URL
                    + ") failed: " + e.getMessage());

View Full Code Here

        System.out
                .println("Publishing content under a topic with the class `PubSub`:");


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out
                    .println("    `void publish(OtpErlangString, OtpErlangString)`...");
            sc.publish(otpTopic, otpContent);
            System.out.println("      publish(" + otpTopic.stringValue() + ", "
                    + otpContent.stringValue() + ") succeeded");
        } catch (final ConnectionException e) {
            System.out.println("      publish(" + otpTopic.stringValue() + ", "
                    + otpContent.stringValue() + ") failed: " + e.getMessage());
        }


        try {
            System.out.println("  creating object...");
            final PubSub sc = new PubSub();
            System.out.println("    `void publish(String, String)`...");
            sc.publish(topic, content);
            System.out.println("      publish(" + topic + ", " + content
                    + ") succeeded");
        } catch (final ConnectionException e) {
            System.out.println("      publish(" + topic + ", " + content
                    + ") failed: " + e.getMessage());

View Full Code Here

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Related Classes of de.zib.scalaris.PubSub

com.ericsson.otp.erlang.OtpErlangList

com.ericsson.otp.erlang.OtpErlangObject

com.ericsson.otp.erlang.OtpErlangString

com.ericsson.otp.erlang.OtpErlangTuple

de.zib.scalaris.examples.PubSubGetSubscribersExample

de.zib.scalaris.examples.PubSubPublishExample

de.zib.scalaris.examples.PubSubSubscribeExample

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Examples of de.zib.scalaris.PubSub

Subscribing to topics

Unsubscribing from topics

Getting a list of subscribers to a topic

Connection errors

Related Classes of de.zib.scalaris.PubSub