Alachisoft.NCache.Common.DataStructures.HashMapBucket Maven / Gradle / Ivy

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package Alachisoft.NCache.Common.DataStructures;

import Alachisoft.NCache.Common.Net.Address;
import Alachisoft.NCache.Common.Threading.Latch;
import Alachisoft.NCache.Common.Threading.Monitor;
import com.alachisoft.ncache.serialization.core.io.ICompactSerializable;
import com.alachisoft.ncache.serialization.core.io.NCacheObjectInput;
import com.alachisoft.ncache.serialization.core.io.NCacheObjectOutput;

import java.io.IOException;

/**
 * Each key based on the hashcode belongs to a bucket. This class keeps the overall stats for the bucket and points to its owner.
 */
public class HashMapBucket implements ICompactSerializable, Cloneable {

    private int _bucketId;
    private Address _tempAddress;
    private Address _permanentAddress;
    private Latch _stateTxfrLatch = new Latch(BucketStatus.Functional);
    private Object _status_wait_mutex = new Object();

    public HashMapBucket(Address address, int id) {
        _tempAddress = _permanentAddress = address;
        _bucketId = id;
        _stateTxfrLatch = new Latch(BucketStatus.Functional);
    }
//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
//ORIGINAL LINE: public HashMapBucket(Address address, int id,byte status)

    public HashMapBucket(Address address, int id, byte status) {
        this(address, id);
        setStatus(status);
    }

    /**
     * @deprecated used only for ICompactSerializable
     */
    @Deprecated
    public HashMapBucket() {
    }

    public final int getBucketId() {
        return _bucketId;
    }

    public final Address getTempAddress() {
        return _tempAddress;
    }

    public final void setTempAddress(Address value) {
        _tempAddress = value;
    }

    public final Address getPermanentAddress() {
        return _permanentAddress;
    }

    public final void setPermanentAddress(Address value) {
        _permanentAddress = value;
    }

    //C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
//ORIGINAL LINE: public void WaitForStatus(Address tmpOwner, byte status)
    public final void WaitForStatus(Address tmpOwner, byte status) throws InterruptedException {
        if (tmpOwner != null) {

            while (tmpOwner == _tempAddress) {
                if (_stateTxfrLatch.IsAnyBitsSet(status)) {
                    return;
                }
                synchronized (_status_wait_mutex) {
                    if ((tmpOwner == _tempAddress) || _stateTxfrLatch.IsAnyBitsSet(status)) {
                        return;
                    }
                    //Basit: Interrupt exception thrown (added)
                    Monitor.wait(_status_wait_mutex); //_status_wait_mutex.wait();
                }
            }
        }
    }

    public final void NotifyBucketUpdate() {
        synchronized (_status_wait_mutex) {
            Monitor.pulse(_status_wait_mutex); //_status_wait_mutex.notifyAll();
        }
    }
//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
//ORIGINAL LINE: public void setStatus(byte value)

    /**
     * Sets the status of the bucket. A bucket can have any of the following status 1- Functional 2- UnderStateTxfr 3- NeedStateTransfer.
     */
//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
//ORIGINAL LINE: public byte getStatus()
    public final byte getStatus() {
        return _stateTxfrLatch.getStatus().getData();
    }

    public final void setStatus(byte value) {
        switch (value) {
            case BucketStatus.Functional:
            case BucketStatus.NeedTransfer:
            case BucketStatus.UnderStateTxfr:
                //these are valid status,we allow them to be set.
//C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
//ORIGINAL LINE: byte oldStatus = _stateTxfrLatch.Status.Data;
                byte oldStatus = _stateTxfrLatch.getStatus().getData();
                if (oldStatus == value) {
                    return;
                }
                _stateTxfrLatch.SetStatusBit(value, oldStatus);
                break;
        }
    }

    public final Latch getStateTxfrLatch() {
        return _stateTxfrLatch;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof HashMapBucket) {
            return this.getBucketId() == ((HashMapBucket) obj).getBucketId();
        }
        return false;
    }

    public final Object clone() {
        HashMapBucket hmBucket = new HashMapBucket(_permanentAddress, _bucketId);
        hmBucket.setTempAddress(_tempAddress);
        hmBucket.setStatus(getStatus());
        return hmBucket;
    }

    //C# TO JAVA CONVERTER TODO TASK: There is no preprocessor in Java:
    ///#region ICompactSerializable Members
    public void deserialize(NCacheObjectInput reader) throws ClassNotFoundException, IOException {
        //Trace.error("HashMapBucket.Deserialize", "Deserialize Called");
        _bucketId = reader.readInt();
        _tempAddress = (Address) reader.readObject();
        _permanentAddress = (Address) reader.readObject();
        //C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
        //ORIGINAL LINE: byte status = reader.ReadByte();
        byte status = reader.readByte();
        _stateTxfrLatch = new Latch(status);

    }

    public void serialize(NCacheObjectOutput writer) throws IOException {
        //Trace.error("HashMapBucket.Serialize", "Serialize Called");
        writer.writeInt(_bucketId);
        writer.writeObject(_tempAddress);
        writer.writeObject(_permanentAddress);
        writer.writeByte(_stateTxfrLatch.getStatus().getData());
    }

    //C# TO JAVA CONVERTER TODO TASK: There is no preprocessor in Java:
    ///#endregion
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Bucket[" + _bucketId + " ; ");
        sb.append("owner = " + _permanentAddress + " ; ");
        sb.append("temp = " + _tempAddress + " ; ");
        String status = BucketStatus.StatusToString(_stateTxfrLatch.getStatus().getData());
        sb.append(status + " ]");
        return sb.toString();

    }
}