1 package de.juplo.kafka.chat.backend.implementation;
3 import de.juplo.kafka.chat.backend.domain.ChatHomeService;
4 import de.juplo.kafka.chat.backend.domain.ChatRoomInfo;
5 import de.juplo.kafka.chat.backend.domain.Message;
6 import org.slf4j.Logger;
7 import org.slf4j.LoggerFactory;
8 import reactor.core.publisher.Flux;
10 import java.util.UUID;
11 import java.util.function.BiConsumer;
12 import java.util.function.Consumer;
15 public interface StorageStrategy
17 Logger log = LoggerFactory.getLogger(StorageStrategy.class.getCanonicalName());
19 default void write(ChatHomeService chatHomeService)
23 this::logSuccessChatHomeService,
24 this::logFailureChatHomeService);
28 ChatHomeService chatHomeService,
29 ChatHomeServiceWrittenSuccessCallback successCallback,
30 ChatHomeServiceWrittenFailureCallback failureCallback)
35 .doOnComplete(() -> successCallback.accept(chatHomeService))
36 .doOnError(throwable -> failureCallback.accept(chatHomeService, throwable))
37 .doOnNext(chatRoomInfo -> writeChatRoomData(
40 .getChatRoomData(chatRoomInfo.getId())
41 .flatMapMany(chatRoomData -> chatRoomData.getMessages()),
42 this::logSuccessChatRoom,
43 this::logFailureChatRoom)));
46 void writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux);
47 Flux<ChatRoomInfo> readChatRoomInfo();
48 default void writeChatRoomData(
50 Flux<Message> messageFlux,
51 ChatRoomWrittenSuccessCallback successCallback,
52 ChatRoomWrittenFailureCallback failureCallback)
57 .doOnComplete(() -> successCallback.accept(chatRoomId))
58 .doOnError(throwable -> failureCallback.accept(chatRoomId, throwable)));
60 void writeChatRoomData(UUID chatRoomId, Flux<Message> messageFlux);
61 Flux<Message> readChatRoomData(UUID chatRoomId);
63 interface ChatHomeServiceWrittenSuccessCallback extends Consumer<ChatHomeService> {}
64 interface ChatHomeServiceWrittenFailureCallback extends BiConsumer<ChatHomeService, Throwable> {}
66 default void logSuccessChatHomeService(ChatHomeService chatHomeService)
68 log.info("Successfully stored {}", chatHomeService);
71 default void logFailureChatHomeService(ChatHomeService chatHomeService, Throwable throwable)
73 log.error("Could not store {}: {}", chatHomeService, throwable);
76 interface ChatRoomWrittenSuccessCallback extends Consumer<UUID> {}
77 interface ChatRoomWrittenFailureCallback extends BiConsumer<UUID, Throwable> {}
79 default void logSuccessChatRoom(UUID chatRoomId)
81 log.info("Successfully stored chat-room {}", chatRoomId);
84 default void logFailureChatRoom(UUID chatRoomId, Throwable throwable)
86 log.error("Could not store chat-room {}: {}", chatRoomId, throwable);