pl.allegro.tech.hermes.domain.topic.preview.TopicsMessagesPreview Maven / Gradle / Ivy

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Fast and reliable message broker built on top of Kafka.

The newest version!

package pl.allegro.tech.hermes.domain.topic.preview;

import pl.allegro.tech.hermes.api.TopicName;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class TopicsMessagesPreview {

    private final Map> messages = new HashMap<>();

    public void add(TopicName topicName, MessagePreview message) {
        List messageList = messages.computeIfAbsent(topicName, k -> new ArrayList<>());
        messageList.add(message);
    }

    public Collection topics() {
        return messages.keySet();
    }

    public List previewOf(TopicName topic) {
        return messages.getOrDefault(topic, new ArrayList<>());
    }
}