AbstractDnsMessage Class — netty Architecture

Source Code

codec-dns/src/main/java/io/netty/handler/codec/dns/AbstractDnsMessage.java lines 34–472

public abstract class AbstractDnsMessage extends AbstractReferenceCounted implements DnsMessage {

    private static final ResourceLeakDetector<DnsMessage> leakDetector =
            ResourceLeakDetectorFactory.instance().newResourceLeakDetector(DnsMessage.class);

    private static final int SECTION_QUESTION = DnsSection.QUESTION.ordinal();
    private static final int SECTION_COUNT = 4;

    private final ResourceLeakTracker<DnsMessage> leak = leakDetector.track(this);
    private short id;
    private DnsOpCode opCode;
    private boolean recursionDesired;
    private byte z;

    // To reduce the memory footprint of a message,
    // each of the following fields is a single record or a list of records.
    private Object questions;
    private Object answers;
    private Object authorities;
    private Object additionals;

    /**
     * Creates a new instance with the specified {@code id} and {@link DnsOpCode#QUERY} opCode.
     */
    protected AbstractDnsMessage(int id) {
        this(id, DnsOpCode.QUERY);
    }

    /**
     * Creates a new instance with the specified {@code id} and {@code opCode}.
     */
    protected AbstractDnsMessage(int id, DnsOpCode opCode) {
        setId(id);
        setOpCode(opCode);
    }

    @Override
    public int id() {
        return id & 0xFFFF;
    }

    @Override
    public DnsMessage setId(int id) {
        this.id = (short) id;
        return this;
    }

    @Override
    public DnsOpCode opCode() {
        return opCode;
    }

    @Override
    public DnsMessage setOpCode(DnsOpCode opCode) {
        this.opCode = checkNotNull(opCode, "opCode");
        return this;
    }

    @Override
    public boolean isRecursionDesired() {
        return recursionDesired;
    }

    @Override
    public DnsMessage setRecursionDesired(boolean recursionDesired) {
        this.recursionDesired = recursionDesired;
        return this;
    }

    @Override
    public int z() {
        return z;
    }

    @Override
    public DnsMessage setZ(int z) {
        this.z = (byte) (z & 7);
        return this;
    }

    @Override