org.apache.pulsar.client.impl

Class ReaderImpl<T>

java.lang.Object

org.apache.pulsar.client.impl.ReaderImpl<T>

All Implemented Interfaces:

Closeable, AutoCloseable, Reader<T>

public class ReaderImpl<T>
extends Object
implements Reader<T>

Constructor Summary

Constructors

Constructor and Description
ReaderImpl(PulsarClientImpl client, ReaderConfigurationData<T> readerConfiguration, ExecutorService listenerExecutor, CompletableFuture<Consumer<T>> consumerFuture, Schema<T> schema)

Method Summary

Modifier and Type	Method and Description
void	close()
CompletableFuture<Void>	closeAsync() Asynchronously close the reader and stop the broker to push more messages
ConsumerImpl<T>	getConsumer()
String	getTopic()
boolean	hasMessageAvailable() Check if there is any message available to read from the current position.
CompletableFuture<Boolean>	hasMessageAvailableAsync() Asynchronously Check if there is message that has been published successfully to the broker in the topic.
boolean	hasReachedEndOfTopic() Return true if the topic was terminated and this reader has reached the end of the topic
boolean	isConnected()
Message<T>	readNext() Read the next message in the topic
Message<T>	readNext(int timeout, TimeUnit unit) Read the next message in the topic waiting for a maximum of timeout time units.
CompletableFuture<Message<T>>	readNextAsync()

Methods inherited from class java.lang.Object

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

Constructor Detail

ReaderImpl

public ReaderImpl(PulsarClientImpl client,
                  ReaderConfigurationData<T> readerConfiguration,
                  ExecutorService listenerExecutor,
                  CompletableFuture<Consumer<T>> consumerFuture,
                  Schema<T> schema)

Method Detail

getTopic

public String getTopic()

Specified by:

getTopic in interface Reader<T>

Returns:

the topic from which this reader is reading from

getConsumer

public ConsumerImpl<T> getConsumer()

hasReachedEndOfTopic

public boolean hasReachedEndOfTopic()

Description copied from interface: Reader

Return true if the topic was terminated and this reader has reached the end of the topic

Specified by:

hasReachedEndOfTopic in interface Reader<T>

readNext

public Message<T> readNext()
                    throws PulsarClientException

Description copied from interface: Reader

Read the next message in the topic

Specified by:

readNext in interface Reader<T>

Returns:

the next messasge

Throws:

PulsarClientException

readNext

public Message<T> readNext(int timeout,
                           TimeUnit unit)
                    throws PulsarClientException

Description copied from interface: Reader

Read the next message in the topic waiting for a maximum of timeout time units. Returns null if no message is recieved in that time.

Specified by:

readNext in interface Reader<T>

Returns:

the next message(Could be null if none received in time)

Throws:

PulsarClientException

readNextAsync

public CompletableFuture<Message<T>> readNextAsync()

Specified by:

readNextAsync in interface Reader<T>

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

closeAsync

public CompletableFuture<Void> closeAsync()

Description copied from interface: Reader

Asynchronously close the reader and stop the broker to push more messages

Specified by:

closeAsync in interface Reader<T>

Returns:

a future that can be used to track the completion of the operation

hasMessageAvailable

public boolean hasMessageAvailable()
                            throws PulsarClientException

Description copied from interface: Reader

Check if there is any message available to read from the current position.

Specified by:

hasMessageAvailable in interface Reader<T>

Throws:

PulsarClientException

hasMessageAvailableAsync

public CompletableFuture<Boolean> hasMessageAvailableAsync()

Description copied from interface: Reader

Asynchronously Check if there is message that has been published successfully to the broker in the topic.

Specified by:

hasMessageAvailableAsync in interface Reader<T>

isConnected

public boolean isConnected()

Specified by:

isConnected in interface Reader<T>

Returns:

Whether the reader is connected to the broker