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Configuration API for PubNub Java SDK

Java V4 complete API reference for building real-time applications on PubNub, including basic usage and sample code.

Configuration

Description

PNConfiguration instance is storage for user-provided information which describe further PubNub client behavior. Configuration instance contain additional set of properties which allow to perform precise PubNub client configuration.

Method(s)

To create configuration instance you can use the following function in the Java V4 SDK:

new PNConfiguration();
PropertiesTypeRequiredDefaultsDescription
setSubscribeKeyStringYessubscribeKey from the Admin Portal.
setPublishKeyStringOptionalpublishKey from the Admin Portal (only required if publishing).
setSecretKeyStringOptionalsecretKey (only required for access operations, keep away from Android).
setCipherKeyStringOptionalIf cipher is passed, all communications to and from PubNub will be encrypted.
setUuidStringYesUUID to use. You should set a unique UUID to identify the user or the device that connects to PubNub.
If you don't set the UUID, you won't be able to connect to PubNub.
setLogVerbosityPNLogVerbosityOptionalPNLogVerbosity.NONESet PNLogVerbosity.BODY to enable debugging. To disable debugging use the option PNLogVerbosity.NONE
setAuthKeyStringOptionalNot setIf Access Manager is utilized, client will use this authKey in all restricted requests.
setCacheBustingBooleanOptionalIf operating behind a misbehaving proxy, allow the client to shuffle the subdomains.
setSecureBooleanOptionaltrueWhen true TLS is enabled.
setConnectTimeoutIntOptional5How long before the client gives up trying to connect with a subscribe call.
The value is in seconds.
setSubscribeTimeoutIntOptional310The subscribe request timeout.
The value is in seconds.
setNonSubscribeRequestTimeoutIntOptional10For non subscribe operations (publish, herenow, etc), how long to wait to connect to PubNub before giving up with a connection timeout error.
The value is in seconds.
setFilterExpressionStringOptionalNot setFeature to subscribe with a custom filter expression.
setHeartbeatNotificationOptionsPNHeartbeatNotificationOptionsOptionalPNHeartbeatNotificationOptions.FAILURESHeartbeat notification options. By default, the SDK alerts on failed heartbeats (equivalent to PNHeartbeatNotificationOptions.FAILURES).
Other options including all heartbeats (PNHeartbeatNotificationOptions.ALL) and no heartbeats (PNHeartbeatNotificationOptions.NONE) are supported.
setOriginStringOptionalCustom origin if needed.
setReconnectionPolicyPNReconnectionPolicyOptionalPNReconnectionPolicy.NONESet to PNReconnectionPolicy.LINEAR for automatic reconnects. Use PNReconnectionPolicy.NONE to disable automatic reconnects.
Use PNReconnectionPolicy.EXPONENTIAL to set exponential retry interval.
setPresenceTimeoutIntOptional300Sets the custom presence server timeout.
The value is in seconds, and the minimum value is 20 seconds.
setPresenceTimeoutWithCustomIntervalInt, IntOptional300, 0Parameters are presence timeout (same as setPresenceTimeout) and custom heartbeat interval at which to ping the server.
setProxyProxyOptionalInstructs the SDK to use a proxy configuration when communicating with PubNub servers. For more details see this https://docs.oracle.com/javase/7/docs/api/java/net/Proxy.html
setMaximumReconnectionRetriesIntOptional-1The config sets how many times to retry to reconnect before giving up.
setProxySelectorProxySelectorOptionalSets Java ProxySelector. For more details, refer to https://docs.oracle.com/javase/7/docs/api/java/net/ProxySelector.html
setProxyAuthenticatorAuthenticatorOptionalSets Java Authenticator. For more details refer to https://docs.oracle.com/javase/7/docs/api/java/net/Authenticator.html
setGoogleAppEngineNetworkingBooleanOptionalEnable Google App Engine networking.
setSuppressLeaveEventsBooleanOptionalfalseWhen true the SDK doesn't send out the leave requests.
requestMessageCountThresholdIntOptional100PNRequestMessageCountExceededCategory is thrown when the number of messages into the payload is above requestMessageCountThreshold.
setDisableTokenManagerBooleanOptionalfalseDisables the TMS (Token Manager System) in a way that it won't authorize requests even if there are applicable tokens.
useRandomInitializationVectorBooleanOptionaltrueWhen true the initialization vector (IV) is random for all requests (not just for file upload). When false the IV is hard-coded for all requests except for file upload.
Disabling random initialization vector

Disable random initialization vector (IV) only for backward compatibility (<5.0.0) with existing applications. Never disable random IV on new applications.

Basic Usage

Note

Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

PNConfiguration pnConfiguration = new PNConfiguration();
// subscribeKey from Admin Portal
pnConfiguration.setSubscribeKey("SubscribeKey"); // required
// publishKey from Admin Portal (only required if publishing)
pnConfiguration.setPublishKey("PublishKey");
// secretKey (only required for access operations, keep away from Android)
pnConfiguration.setSecretKey("SecretKey");
// if cipherKey is passed, all communicatons to/from pubnub will be encrypted
pnConfiguration.setCipherKey("cipherKey");
// UUID to be used as a device identifier
pnConfiguration.setUuid("myUniqueUUID");
// Enable Debugging
pnConfiguration.setLogVerbosity(PNLogVerbosity.BODY);
// if Access Manager is utilized, client will use this authKey in all restricted
// requests
pnConfiguration.setAuthKey("authKey");
// use SSL.
pnConfiguration.setSecure(true);
// PSV2 feature to subscribe with a custom filter expression
pnConfiguration.setFilterExpression("such=wow");
// heartbeat notifications, by default, the SDK will alert on failed heartbeats.
// other options such as all heartbeats or no heartbeats are supported.
pnConfiguration.setHeartbeatNotificationOptions(PNHeartbeatNotificationOptions.All);
pnConfiguration.setPresenceTimeout(120);
// the number of messages into the payload
pnConfiguration.setRequestMessageCountThreshold(100);

Initialization

Add PubNub to your project using one of the procedures defined under How to Get It

Description

This function is used for initializing the PubNub Client API context. This function must be called before attempting to utilize any API functionality in order to establish account level credentials such as publishKey and subscribeKey.

Method(s)

To Initialize PubNub you can use the following method(s) in the Java V4 SDK:

  1. new PubNub(pnConfiguration);
    
    ParameterTypeRequiredDescription
    pnConfigurationPNConfigurationYesGoto Configuration for more details.

Basic Usage

Initialize the PubNub client API:

Note

Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

PNConfiguration pnConfiguration = new PNConfiguration();
pnConfiguration.setSubscribeKey("my_subkey");
pnConfiguration.setPublishKey("my_pubkey");
pnConfiguration.setSecure(true);
pnConfiguration.setUuid("myUniqueUUID");
PubNub pubnub = new PubNub(pnConfiguration);

Returns

It returns the PubNub instance for invoking PubNub APIs like publish(), subscribe(), history(), hereNow(), etc.

Other Examples

  1. Initialize a non-secure client:

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("SubscribeKey");
    pnConfiguration.setPublishKey("PublishKey");
    pnConfiguration.setSecure(false);
    pnConfiguration.setUuid("myUniqueUUID");
    PubNub pubnub = new PubNub(pnConfiguration);
    
  2. Initialization for a Read-Only client:

    In the case where a client will only read messages and never publish to a channel, you can simply omit the publishKey when initializing the client:

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("my_subkey");
    PubNub pubnub = new PubNub(pnConfiguration);
    
  3. Use a custom UUID

    Set a custom UUID to identify your users.

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("mySubscribeKey");
    pnConfiguration.setPublishKey("myPublishKey");
    pnConfiguration.setUuid("myUniqueUUID");
    PubNub pubnub = new PubNub(pnConfiguration);
    
  4. Initializing with SSL Enabled:

    This examples demonstrates how to enable PubNub Transport Layer Encryption with SSL. Just initialize the client with setSecure set to true. The hard work is done, now the PubNub API takes care of the rest. Just subscribe and publish as usual and you are good to go.

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("my_subkey");
    pnConfiguration.setPublishKey("my_pubkey");
    pnConfiguration.setSecure(true);
    pnConfiguration.setUuid("myUniqueUUID");
    PubNub pubnub = new PubNub(pnConfiguration);
    
  5. Initializing with Access Manager: Requires Access Manager add-onRequires that the Access Manager add-on is enabled for your key. See this page on enabling add-on features on your keys:
    https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

    Note

    Anyone with the secretKey can grant and revoke permissions to your app. Never let your secretKey be discovered, and to only exchange it / deliver it securely. Only use the secretKey on secure server-side platforms.

    When you init with secretKey, you get root permissions for the Access Manager. With this feature you don't have to grant access to your servers to access channel data. The servers get all access on all channels.

    For applications that will administer PAM permissions, the API is initialized with the secretKey as in the following example:

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("my_subkey");
    pnConfiguration.setPublishKey("my_pubkey");
    pnConfiguration.setSecretKey("my_secretkey");
    pnConfiguration.setUuid("myUniqueUUID");
    pnConfiguration.setSecure(true);
    
    PubNub pubnub = new PubNub(pnConfiguration);
    

    Now that the pubnub object is instantiated the client will be able to access the PAM functions. The pubnub object will use the secretKey to sign all PAM messages to the PubNub Network.

  6. How to Set Proxy:

    Note

    Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

    PNConfiguration pnConfiguration = new PNConfiguration();
    pnConfiguration.setSubscribeKey("mySubscribeKey");
    pnConfiguration.setPublishKey("myPublishKey");
    pnConfiguration.setSecretKey("mySecretKey");
    pnConfiguration.setUuid("myUniqueUUID");
    Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("http://mydomain.com", 8080));
    pnConfiguration.setProxy(proxy);
    PubNub pubNub = new PubNub(pnConfiguration);
    

Event Listeners

Description

You can be notified of connectivity status, message and presence notifications via the listeners.

Listeners should be added before calling the method.

Adding Listeners

pubnub.addListener(new SubscribeCallback() {
    // PubNub status
    @Override
    public void status(PubNub pubnub, PNStatus status) {
        switch (status.getOperation()) {
            // combine unsubscribe and subscribe handling for ease of use
            case PNSubscribeOperation:
            case PNUnsubscribeOperation:
                // Note: subscribe statuses never have traditional errors,
                // just categories to represent different issues or successes
                // that occur as part of subscribe
                switch (status.getCategory()) {
                    case PNConnectedCategory:
                        // No error or issue whatsoever.
                    case PNReconnectedCategory:
                        // Subscribe temporarily failed but reconnected.
                        // There is no longer any issue.
                    case PNDisconnectedCategory:
                        // No error in unsubscribing from everything.
                    case PNUnexpectedDisconnectCategory:
                        // Usually an issue with the internet connection.
                        // This is an error: handle appropriately.
                    case PNAccessDeniedCategory:
                        // PAM does not allow this client to subscribe to this
                        // channel and channel group configuration. This is
                        // another explicit error.
                    default:
                        // You can directly specify more errors by creating
                        // explicit cases for other error categories of
                        // `PNStatusCategory` such as `PNTimeoutCategory` or
                        // `PNMalformedFilterExpressionCategory` or
                        // `PNDecryptionErrorCategory`.
                }

            case PNHeartbeatOperation:
                // Heartbeat operations can in fact have errors, so it's important to check first for an error.
                // For more information on how to configure heartbeat notifications through the status
                // PNObjectEventListener callback, refer to
                // /docs/sdks/java/android/api-reference/configuration#configuration_basic_usage
                if (status.isError()) {
                    // There was an error with the heartbeat operation, handle here
                } else {
                    // heartbeat operation was successful
                }
            default: {
                // Encountered unknown status type
            }
        }
    }

    // Messages
    @Override
    public void message(PubNub pubnub, PNMessageResult message) {
        String messagePublisher = message.getPublisher();
        System.out.println("Message publisher: " + messagePublisher);
        System.out.println("Message Payload: " + message.getMessage());
        System.out.println("Message Subscription: " + message.getSubscription());
        System.out.println("Message Channel: " + message.getChannel());
        System.out.println("Message timetoken: " + message.getTimetoken());
    }

    // Presence
    @Override
    public void presence(@NotNull PubNub pubnub, @NotNull PNPresenceEventResult presence) {
        System.out.println("Presence Event: " + presence.getEvent());
        // Can be join, leave, state-change or timeout

        System.out.println("Presence Channel: " + presence.getChannel());
        // The channel to which the message was published

        System.out.println("Presence Occupancy: " + presence.getOccupancy());
        // Number of users subscribed to the channel

        System.out.println("Presence State: " + presence.getState());
        // User state

        System.out.println("Presence UUID: " + presence.getUuid());
        // UUID to which this event is related

        presence.getJoin();
        // List of users that have joined the channel (if event is 'interval')

        presence.getLeave();
        // List of users that have left the channel (if event is 'interval')

        presence.getTimeout();
        // List of users that have timed-out off the channel (if event is 'interval')

        presence.getHereNowRefresh();
        // Indicates to the client that it should call 'hereNow()' to get the
        // complete list of users present in the channel.
    }

    // Signals
    @Override
    public void signal(PubNub pubnub, PNSignalResult pnSignalResult) {
        System.out.println("Signal publisher: " + signal.getPublisher());
        System.out.println("Signal payload: " + signal.getMessage());
        System.out.println("Signal subscription: " + signal.getSubscription());
        System.out.println("Signal channel: " + signal.getChannel());
        System.out.println("Signal timetoken: " + signal.getTimetoken());
    }

    // Message actions
    @Override
    public void messageAction(PubNub pubnub, PNMessageActionResult pnActionResult) {
        PNMessageAction pnMessageAction = pnActionResult.getAction();
        System.out.println("Message action type: " + pnMessageAction.getType());
        System.out.println("Message action value: " + pnMessageAction.getValue());
        System.out.println("Message action uuid: " + pnMessageAction.getUuid());
        System.out.println("Message action actionTimetoken: " + pnMessageAction.getActionTimetoken());
        System.out.println("Message action messageTimetoken: " + pnMessageAction.getMessageTimetoken());]
        System.out.println("Message action subscription: " + pnActionResult.getSubscription());
        System.out.println("Message action channel: " + pnActionResult.getChannel());
        System.out.println("Message action timetoken: " + pnActionResult.getTimetoken());
    }

    // files
    @Override
    public void file(PubNub pubnub, PNFileEventResult pnFileEventResult) {
        System.out.println("File channel: " + pnFileEventResult.getChannel());
        System.out.println("File publisher: " + pnFileEventResult.getPublisher());
        System.out.println("File message: " + pnFileEventResult.getMessage());
        System.out.println("File timetoken: " + pnFileEventResult.getTimetoken());
        System.out.println("File file.id: " + pnFileEventResult.downloadFile().getId());
        System.out.println("File file.name: " + pnFileEventResult.downloadFile().getName());
        System.out.println("File file.url: " + pnFileEventResult.downloadFile().getUrl());
    }
});

Removing Listeners

SubscribeCallback subscribeCallback = new SubscribeCallback() {
    @Override
    public void status(PubNub pubnub, PNStatus status) {

    }

    @Override
    public void message(PubNub pubnub, PNMessageResult message) {

    }

    @Override
    public void presence(PubNub pubnub, PNPresenceEventResult presence) {

    }

    @Override
    public void signal(PubNub pubnub, PNSignalResult pnSignalResult) {

    }

    @Override
    public void messageAction(PubNub pubnub, PNMessageActionResult pnActionResult) {

    }

    @Override
    public void user(PubNub pubnub, PNUserResult pnUserResult) {

    }

    @Override
    public void space(PubNub pubnub, PNSpaceResult pnSpaceResult) {

    }

    @Override
    public void membership(PubNub pubnub, PNMembershipResult pnMembershipResult) {

    }

    @Override
    public void file(PubNub pubnub, PNFileEventResult pnFileEventResult) {

    }

};

pubnub.addListener(subscribeCallback);

// some time later
pubnub.removeListener(subscribeCallback);

Handling Disconnects

SubscribeCallback subscribeCallback = new SubscribeCallback() {
    @Override
    public void status(PubNub pubnub, PNStatus status) {
        if (status.getCategory() == PNStatusCategory.PNUnexpectedDisconnectCategory) {
            // internet got lost, do some magic and call reconnect when ready
            pubnub.reconnect();
        } else if (status.getCategory() == PNStatusCategory.PNTimeoutCategory) {
            // do some magic and call reconnect when ready
            pubnub.reconnect();
        } else {
            log.error(status);
        }
    }

    @Override
    public void message(PubNub pubnub, PNMessageResult message) {

    }

    @Override
    public void presence(PubNub pubnub, PNPresenceEventResult presence) {

    }
};

pubnub.addListener(subscribeCallback);

Listener status events

CategoryDescription
PNNetworkUpCategoryThe SDK detected that the network is online.
PNNetworkDownCategoryThe SDK announces this when a connection isn't available, or when the SDK isn't able to reach the PubNub Data Stream Network.
PNNetworkIssuesCategoryA subscribe event experienced an exception when running. The SDK isn't able to reach the PubNub Data Stream Network. This may be due to many reasons, such as: the machine or device isn't connected to the internet; the internet connection has been lost; your internet service provider is having trouble; or, perhaps the SDK is behind a proxy.
PNReconnectedCategoryThe SDK was able to reconnect to PubNub.
PNConnectedCategorySDK subscribed with a new mix of channels. This is fired every time the channel or channel group mix changes.
PNAccessDeniedCategoryPAM permission failure.
PNMalformedResponseCategoryJSON parsing crashed.
PNBadRequestCategoryThe server responded with a bad response error because the request is malformed.
PNDecryptionErrorCategoryIf using decryption strategies and the decryption fails.
PNTimeoutCategoryFailure to establish a connection to PubNub due to a timeout.
PNRequestMessageCountExceedCategoryThe SDK announces this error if requestMessageCountThreshold is set, and the number of messages received from PubNub (in-memory cache messages) exceeds the threshold.
PNUnknownCategoryReturned when the subscriber gets a non-200 HTTP response code from the server.

UUID

Description

These functions are used to set/get a user ID on the fly.

Method(s)

To set/get UUID you can use the following method(s) in Java V4 SDK:

  1. pnConfiguration.setUuid(String);
    
    ParameterTypeRequiredDefaultsDescription
    uuidStringYesUUID to be used as a device identifier. If you don't set the UUID, you won't be able to connect to PubNub.
pnConfiguration.getUuid();

This method doesn't take any arguments.

Basic Usage

Set UUID:

Note

Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

PNConfiguration pnConfiguration = new PNConfiguration();
pnConfiguration.setUuid("myUniqueUUID");

Get UUID:

PNConfiguration pnConfiguration = new PNConfiguration();
pnConfiguration.getUuid();

Authentication Key

Description

Setter and getter for users auth key.

Method(s)

  1. pnConfiguration.setAuthKey(String);
    
    ParameterTypeRequiredDescription
    Auth KeyStringYesIf Access Manager is utilized, client will use this authKey in all restricted requests.
  2. pnConfiguration.getAuthKey();
    

This method doesn't take any arguments.

Basic Usage

Set Auth Key

PNConfiguration pnConfiguration = new PNConfiguration();
pnConfiguration.setAuthKey("authKey");

Get Auth Key

pnConfiguration.getAuthKey();

Returns

None.

Filter Expression

Requires Stream Controller add-onRequires that the Stream Controller add-on is enabled for your key. See this page on enabling add-on features on your keys:
https://support.pubnub.com/hc/en-us/articles/360051974791-How-do-I-enable-add-on-features-for-my-keys-

Description

Stream filtering allows a subscriber to apply a filter to only receive messages that satisfy the conditions of the filter. The message filter is set by the subscribing client(s) but it is applied on the server side thus preventing unwanted messages (those that do not meet the conditions of the filter) from reaching the subscriber.

To set/get filters you can use the following method. To learn more about filtering, refer to the Publish Messages documentation.

Method(s)

  1. pnConfiguration.setFilterExpression(String);
    
    ParameterTypeRequiredDescription
    filterExpressionStringYesPSV2 feature to subscribe with a custom filter expression
  2. pnConfiguration.getFilterExpression();
    

This method doesn't take any arguments.

Basic Usage

Set Filter Expression

Note

Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

Note

Always set the UUID to uniquely identify the user or device that connects to PubNub. This UUID should be persisted, and should remain unchanged for the lifetime of the user or the device. If you don't set the UUID, you won't be able to connect to PubNub.

PNConfiguration pnConfiguration = new PNConfiguration();
pnConfiguration.setFilterExpression("such=wow");

Get Filter Expression

pnConfiguration.getFilterExpression();
← Getting StartedPublish & Subscribe →
  • Configuration
    • Description
    • Method(s)
    • Basic Usage
  • Initialization
    • Description
    • Method(s)
    • Basic Usage
    • Returns
    • Other Examples
  • Event Listeners
    • Description
  • UUID
    • Description
    • Method(s)
    • Basic Usage
  • Authentication Key
    • Description
    • Method(s)
    • Basic Usage
    • Returns
  • Filter Expression
    • Description
    • Method(s)
    • Basic Usage
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