ArrayRedisMessage Class — netty Architecture

Source Code

codec-redis/src/main/java/io/netty/handler/codec/redis/ArrayRedisMessage.java lines 30–177

@UnstableApi
public class ArrayRedisMessage extends AbstractReferenceCounted implements RedisMessage {

    private final List<RedisMessage> children;

    private ArrayRedisMessage() {
        children = Collections.emptyList();
    }

    /**
     * Creates a {@link ArrayRedisMessage} for the given {@code content}.
     *
     * @param children the children.
     */
    public ArrayRedisMessage(List<RedisMessage> children) {
        // do not retain here. children are already retained when created.
        this.children = ObjectUtil.checkNotNull(children, "children");
    }

    /**
     * Get children of this Arrays. It can be null or empty.
     *
     * @return list of {@link RedisMessage}s.
     */
    public final List<RedisMessage> children() {
        return children;
    }

    /**
     * Returns whether the content of this message is {@code null}.
     *
     * @return indicates whether the content of this message is {@code null}.
     */
    public boolean isNull() {
        return false;
    }

    @Override
    protected void deallocate() {
        for (RedisMessage msg : children) {
            ReferenceCountUtil.release(msg);
        }
    }

    @Override
    public ArrayRedisMessage touch(Object hint) {
        for (RedisMessage msg : children) {
            ReferenceCountUtil.touch(msg);
        }
        return this;
    }

    @Override
    public String toString() {
        return new StringBuilder(StringUtil.simpleClassName(this))
                .append('[')
                .append("children=")
                .append(children.size())
                .append(']').toString();
    }

    /**
     * A predefined null array instance for {@link ArrayRedisMessage}.
     */
    public static final ArrayRedisMessage NULL_INSTANCE = new ArrayRedisMessage() {
        @Override
        public boolean isNull() {
            return true;
        }

        @Override
        public ArrayRedisMessage retain() {
            return this;
        }

        @Override
        public ArrayRedisMessage retain(int increment) {
            return this;
        }

        @Override