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Fast and reliable message broker built on top of Kafka.

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package pl.allegro.tech.hermes.api;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.google.common.collect.ImmutableMap;
import jakarta.validation.constraints.NotNull;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;

@JsonSerialize(using = EndpointAddressResolverMetadata.EndpointAddressResolverMetadataSerializer.class)
public class EndpointAddressResolverMetadata {

    private static final EndpointAddressResolverMetadata EMPTY_INSTANCE = new EndpointAddressResolverMetadata(Collections.emptyMap());

    @NotNull
    private Map entries;

    @JsonCreator
    public EndpointAddressResolverMetadata(Map entries) {
        this.entries = ImmutableMap.copyOf(entries);
    }

    public static EndpointAddressResolverMetadata empty() {
        return EMPTY_INSTANCE;
    }

    public static Builder endpointAddressResolverMetadata() {
        return new Builder();
    }

    public Optional get(String key) {
        return Optional.ofNullable(entries.get(key));
    }

    @SuppressWarnings("unchecked")
    public  T getOrDefault(String key, T defaultValue) {
        return (T) entries.getOrDefault(key, defaultValue);
    }

    public Map getEntries() {
        return entries;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        EndpointAddressResolverMetadata that = (EndpointAddressResolverMetadata) o;
        return Objects.equals(entries, that.entries);
    }

    @Override
    public int hashCode() {
        return Objects.hash(entries);
    }

    public static class EndpointAddressResolverMetadataSerializer extends StdSerializer {

        protected EndpointAddressResolverMetadataSerializer() {
            super(EndpointAddressResolverMetadata.class);
        }

        @Override
        public void serialize(EndpointAddressResolverMetadata metadata, JsonGenerator jgen, SerializerProvider provider)
                throws IOException {
            jgen.writeObject(metadata.entries);
        }
    }

    public static class Builder {

        private Map entries = new HashMap<>();

        public Builder withEntry(String key, Object value) {
            entries.put(key, value);
            return this;
        }

        public EndpointAddressResolverMetadata build() {
            return new EndpointAddressResolverMetadata(entries);
        }
    }
}
    

    

    

            

    

            



    
    






    
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