de.otto.synapse.messagestore

Class DelegatingSnapshotMessageStore

java.lang.Object

de.otto.synapse.messagestore.DelegatingSnapshotMessageStore

All Implemented Interfaces:

MessageStore, SnapshotMessageStore, java.lang.AutoCloseable

public class DelegatingSnapshotMessageStore
extends java.lang.Object
implements SnapshotMessageStore

Constructor Summary

Constructors

Constructor and Description
DelegatingSnapshotMessageStore(MessageStore delegate)

Method Summary

Modifier and Type	Method and Description
void	add(MessageStoreEntry entry) Deprecated. Unsupported operation.
void	close()
java.util.Set<java.lang.String>	getChannelNames() Returns a set containing the channel names of the messages contained in the MessageStore
com.google.common.collect.ImmutableSet<Index>	getIndexes()
ChannelPosition	getLatestChannelPosition() Deprecated.
ChannelPosition	getLatestChannelPosition(java.lang.String channelName) Returns the latest ChannelPosition of the given channel, derived from the messages contained in this MessageStore.
java.lang.String	getName() Returns the name of the message store.
java.time.Instant	getSnapshotTimestamp()
int	size() Returns the number of messages contained in the MessageStore.
java.util.stream.Stream<MessageStoreEntry>	stream() Returns a Stream of all entries contained in the MessageStore.
java.util.stream.Stream<MessageStoreEntry>	stream(Index index, java.lang.String value) Returns a Stream of all entries contained in the MessageStore that have are matching the given Index value (optional operation).

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingSnapshotMessageStore

public DelegatingSnapshotMessageStore(MessageStore delegate)

Method Detail

getName

public java.lang.String getName()

Description copied from interface: MessageStore

Returns the name of the message store.

Especially for persistent implementations, two MessageStore instances might use this property to identify the underlying database, collection, file etc.

Specified by:

getName in interface MessageStore

Returns:

message store name

getSnapshotTimestamp

public java.time.Instant getSnapshotTimestamp()

Specified by:

getSnapshotTimestamp in interface SnapshotMessageStore

getChannelNames

public java.util.Set<java.lang.String> getChannelNames()

Description copied from interface: MessageStore

Returns a set containing the channel names of the messages contained in the MessageStore

Specified by:

getChannelNames in interface MessageStore

Returns:

set of channel names

getIndexes

public com.google.common.collect.ImmutableSet<Index> getIndexes()

Specified by:

getIndexes in interface MessageStore

getLatestChannelPosition

public ChannelPosition getLatestChannelPosition(java.lang.String channelName)

Description copied from interface: MessageStore

Returns the latest ChannelPosition of the given channel, derived from the messages contained in this MessageStore.

The position is calculated by merging the optional positions of the messages.

Messages without positions will not change the latest ChannelPosition. If no message contains position information, the returned ChannelPosition is ChannelPosition.fromHorizon()

Specified by:

getLatestChannelPosition in interface MessageStore

Parameters:

channelName - the name of the channel

Returns:

ChannelPosition

getLatestChannelPosition

@Deprecated
public ChannelPosition getLatestChannelPosition()

Deprecated.

Specified by:

getLatestChannelPosition in interface MessageStore

stream

public java.util.stream.Stream<MessageStoreEntry> stream()

Description copied from interface: MessageStore

Returns a Stream of all entries contained in the MessageStore.

The stream will maintain the insertion order of the entries.

Specified by:

stream in interface MessageStore

Returns:

Stream of entries

stream

public java.util.stream.Stream<MessageStoreEntry> stream(Index index,
                                                         java.lang.String value)

Description copied from interface: MessageStore

Returns a Stream of all entries contained in the MessageStore that have are matching the given Index value (optional operation).

The stream will maintain the insertion order of the entries.

Specified by:

stream in interface MessageStore

Parameters:

index - the Index

value - the value identifying the requested messages in the specified index

Returns:

stream of message-store entries matching the index or emptyStream, if the index is not known, or if there are no entries

add

@Deprecated
public void add(@Nonnull
                            MessageStoreEntry entry)

Deprecated. Unsupported operation.

Guaranteed to throw an exception and leave the message store unmodified.

Specified by:

add in interface MessageStore

Parameters:

entry - element to be appended to this message store

Throws:

java.lang.UnsupportedOperationException - always

size

public int size()

Description copied from interface: MessageStore

Returns the number of messages contained in the MessageStore.

Primarily used for testing purposes. If the MessageStore can not implement this without major performance impacts (like, for example, having to download and parse huge files from S3), the method is not required to be implemented.

Specified by:

size in interface MessageStore

Returns:

number of messages

close

public void close()

Specified by:

close in interface MessageStore

Specified by:

close in interface java.lang.AutoCloseable