Package org.polkadot.rpc.provider.http

Class HttpProvider

java.lang.Object

org.polkadot.rpc.provider.http.HttpProvider

All Implemented Interfaces:

IProvider

public class HttpProvider
extends java.lang.Object
implements IProvider

# @polkadot/rpc-provider/https HttpProvider The HTTP Provider allows sending requests using HTTP to a HTTP RPC server TCP port. It does not support subscriptions so you won't be able to listen to events such as new blocks or balance changes. It is usually preferrable using the WsProvider. **Example** ```java import org.polkadot.rpc.provider.http.HttpProvider; HttpProvider provider = new HttpProvider('http://127.0.0.1:9933'); ```

See Also:

WsProvider

Nested Class Summary

Nested classes/interfaces inherited from interface org.polkadot.rpc.provider.IProvider

IProvider.CallbackHandler<T,U>, IProvider.ProviderInterfaceEmitCb, IProvider.ProviderInterfaceEmitted, IProvider.SubscriptionHandler

Constructor Summary

Constructors

Constructor	Description
HttpProvider(java.lang.String endpoint)

Method Summary

Modifier and Type	Method	Description
IProvider	clone()	Returns a clone of the object
void	disconnect()	Manually disconnect from the connection
boolean	isConnected()
boolean	isHasSubscriptions()	`true` when this provider supports subscriptions
void	on(IProvider.ProviderInterfaceEmitted emitted, EventEmitter.EventListener cb)	Events are not supported with the HttpProvider, see WsProvider.
com.onehilltech.promises.Promise<java.lang.String>	send(java.lang.String method, java.util.List<java.lang.Object> params, IProvider.SubscriptionHandler subscriptionHandler)	Send HTTP POST Request with Body to configured HTTP Endpoint.
com.onehilltech.promises.Promise<java.lang.String>	subscribe(java.lang.String type, java.lang.String method, java.util.List<java.lang.Object> params, IProvider.CallbackHandler cb)	Subscriptions are not supported with the HttpProvider, see WsProvider.
com.onehilltech.promises.Promise<java.lang.String>	unsubscribe(java.lang.String type, java.lang.String method, int id)	Subscriptions are not supported with the HttpProvider, see WsProvider.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HttpProvider

public HttpProvider(java.lang.String endpoint)

Method Detail

isHasSubscriptions

public boolean isHasSubscriptions()

`true` when this provider supports subscriptions

Specified by:

isHasSubscriptions in interface IProvider

clone

public IProvider clone()

Returns a clone of the object

Specified by:

clone in interface IProvider

Overrides:

clone in class java.lang.Object

disconnect

public void disconnect()

Manually disconnect from the connection

Specified by:

disconnect in interface IProvider

isConnected

public boolean isConnected()

Specified by:

isConnected in interface IProvider

Returns:

{boolean} true if connected Whether the node is connected or not.

on

public void on(IProvider.ProviderInterfaceEmitted emitted,
               EventEmitter.EventListener cb)

Events are not supported with the HttpProvider, see WsProvider. HTTP Provider does not have 'on' emitters. WebSockets should be used instead.

Specified by:

on in interface IProvider

send

public com.onehilltech.promises.Promise<java.lang.String> send(java.lang.String method,
                                                               java.util.List<java.lang.Object> params,
                                                               IProvider.SubscriptionHandler subscriptionHandler)

Send HTTP POST Request with Body to configured HTTP Endpoint.

Specified by:

send in interface IProvider

subscribe

public com.onehilltech.promises.Promise<java.lang.String> subscribe(java.lang.String type,
                                                                    java.lang.String method,
                                                                    java.util.List<java.lang.Object> params,
                                                                    IProvider.CallbackHandler cb)

Subscriptions are not supported with the HttpProvider, see WsProvider.

Specified by:

subscribe in interface IProvider

unsubscribe

public com.onehilltech.promises.Promise<java.lang.String> unsubscribe(java.lang.String type,
                                                                      java.lang.String method,
                                                                      int id)

Subscriptions are not supported with the HttpProvider, see WsProvider.

Specified by:

unsubscribe in interface IProvider