Example usage for io.netty.channel ChannelHandlerContext alloc

List of usage examples for io.netty.channel ChannelHandlerContext alloc

Introduction

In this page you can find the example usage for io.netty.channel ChannelHandlerContext alloc.

Prototype

ByteBufAllocator alloc();

Source Link

Document

Return the assigned ByteBufAllocator which will be used to allocate ByteBuf s.

Usage

From source file:com.couchbase.client.core.endpoint.dcp.DCPConnectionHandler.java

License:Apache License

/**
 * Creates a DCP Open Connection Request.
 *
 * @param ctx the channel handler context.
 * @return a converted {@link BinaryMemcacheRequest}.
 */// ww w  .  jav a 2  s  .co m
private BinaryMemcacheRequest handleOpenConnectionRequest(final ChannelHandlerContext ctx) {
    ByteBuf extras = ctx.alloc().buffer(8);
    extras.writeInt(0) // sequence number
            .writeInt(ConnectionType.CONSUMER.flags());

    byte[] key = connectionName.getBytes(CharsetUtil.UTF_8);
    byte extrasLength = (byte) extras.readableBytes();
    short keyLength = (short) key.length;

    BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(key, extras);
    request.setOpcode(DCPHandler.OP_OPEN_CONNECTION);
    request.setKeyLength(keyLength);
    request.setExtrasLength(extrasLength);
    request.setTotalBodyLength(keyLength + extrasLength);

    return request;
}

From source file:com.couchbase.client.core.endpoint.dcp.DCPConnectionHandler.java

License:Apache License

private FullBinaryMemcacheRequest controlRequest(ChannelHandlerContext ctx, ControlParameter parameter,
        String value) {/*from  ww w  .j av a 2  s  .com*/
    byte[] key = parameter.value().getBytes(CharsetUtil.UTF_8);
    short keyLength = (short) key.length;
    byte[] val = value.getBytes(CharsetUtil.UTF_8);
    ByteBuf body = ctx.alloc().buffer(val.length);
    body.writeBytes(val);

    FullBinaryMemcacheRequest request = new DefaultFullBinaryMemcacheRequest(key, Unpooled.EMPTY_BUFFER, body);
    request.setOpcode(DCPHandler.OP_CONTROL);
    request.setKeyLength(keyLength);
    request.setTotalBodyLength(keyLength + body.readableBytes());
    return request;
}

From source file:com.couchbase.client.core.endpoint.dcp.DCPHandler.java

License:Apache License

/**
 * Creates a DCP Stream Request./*  w  w  w .  j a v a2  s  . c o m*/
 *
 * See the [Protocol Description](https://github.com/couchbaselabs/dcp-documentation/blob/master/documentation/
 * commands/stream-request.md) for more details.
 *
 * @param ctx the channel handler context.
 * @param msg the stream request message.
 * @return a converted {@link BinaryMemcacheRequest}.
 */
private BinaryMemcacheRequest handleStreamRequestRequest(final ChannelHandlerContext ctx,
        final StreamRequestRequest msg) {
    ByteBuf extras = ctx.alloc().buffer(48);
    extras.writeInt(0) // flags
            .writeInt(0) // reserved
            .writeLong(msg.startSequenceNumber()) // start sequence number
            .writeLong(msg.endSequenceNumber()) // end sequence number
            .writeLong(msg.vbucketUUID()) // vbucket UUID
            .writeLong(msg.snapshotStartSequenceNumber()) // snapshot start sequence number
            .writeLong(msg.snapshotEndSequenceNumber()); // snapshot end sequence number

    byte extrasLength = (byte) extras.readableBytes();

    BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(extras);
    request.setOpcode(OP_STREAM_REQUEST);
    request.setExtrasLength(extrasLength);
    request.setTotalBodyLength(extrasLength);

    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueAuthHandler.java

License:Apache License

/**
 * Handles an incoming SASL list mechanisms response and dispatches the next SASL AUTH step.
 *
 * @param ctx the handler context./*from  w  w w  .  j av a  2  s.c  o m*/
 * @param msg the incoming message to investigate.
 * @throws Exception if something goes wrong during negotiation.
 */
private void handleListMechsResponse(ChannelHandlerContext ctx, FullBinaryMemcacheResponse msg)
        throws Exception {
    String remote = ctx.channel().remoteAddress().toString();
    String[] supportedMechanisms = msg.content().toString(CharsetUtil.UTF_8).split(" ");
    if (supportedMechanisms.length == 0) {
        throw new AuthenticationException("Received empty SASL mechanisms list from server: " + remote);
    }

    saslClient = Sasl.createSaslClient(supportedMechanisms, null, "couchbase", remote, null, this);
    selectedMechanism = saslClient.getMechanismName();
    int mechanismLength = selectedMechanism.length();
    byte[] bytePayload = saslClient.hasInitialResponse() ? saslClient.evaluateChallenge(new byte[] {}) : null;
    ByteBuf payload = bytePayload != null ? ctx.alloc().buffer().writeBytes(bytePayload)
            : Unpooled.EMPTY_BUFFER;

    FullBinaryMemcacheRequest initialRequest = new DefaultFullBinaryMemcacheRequest(
            selectedMechanism.getBytes(CharsetUtil.UTF_8), Unpooled.EMPTY_BUFFER, payload);
    initialRequest.setOpcode(SASL_AUTH_OPCODE).setKeyLength((short) mechanismLength)
            .setTotalBodyLength(mechanismLength + payload.readableBytes());

    ChannelFuture future = ctx.writeAndFlush(initialRequest);
    future.addListener(new GenericFutureListener<Future<Void>>() {
        @Override
        public void operationComplete(Future<Void> future) throws Exception {
            if (!future.isSuccess()) {
                LOGGER.warn("Error during SASL Auth negotiation phase.", future);
            }
        }
    });
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

/**
 * Encodes a {@link GetRequest} into its lower level representation.
 *
 * Depending on the flags set on the {@link GetRequest}, the appropriate opcode gets chosen. Currently, a regular
 * get, as well as "get and touch" and "get and lock" are supported. Latter variants have server-side side-effects
 * but do not differ in response behavior.
 *
 * @param ctx the {@link ChannelHandlerContext} to use for allocation and others.
 * @param msg the incoming message./*  w w w . ja  v a 2 s  . co  m*/
 * @return a ready {@link BinaryMemcacheRequest}.
 */
private static BinaryMemcacheRequest handleGetRequest(final ChannelHandlerContext ctx, final GetRequest msg) {
    byte opcode;
    ByteBuf extras;
    if (msg.lock()) {
        opcode = OP_GET_AND_LOCK;
        extras = ctx.alloc().buffer().writeInt(msg.expiry());
    } else if (msg.touch()) {
        opcode = OP_GET_AND_TOUCH;
        extras = ctx.alloc().buffer().writeInt(msg.expiry());
    } else {
        opcode = OP_GET;
        extras = Unpooled.EMPTY_BUFFER;
    }

    byte[] key = msg.keyBytes();
    short keyLength = (short) key.length;
    byte extrasLength = (byte) extras.readableBytes();
    BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(key);
    request.setOpcode(opcode).setKeyLength(keyLength).setExtras(extras).setExtrasLength(extrasLength)
            .setTotalBodyLength(keyLength + extrasLength);
    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

/**
 * Encodes a {@link BinaryStoreRequest} into its lower level representation.
 *
 * There are three types of store operations that need to be considered: insert, upsert and replace, which
 * directly translate to the add, set and replace binary memcached opcodes. By convention, only the replace
 * command supports setting a CAS value, even if the others theoretically would do as well (but do not provide
 * benefit in such cases)./* ww  w.j a  v  a  2 s.  com*/
 *
 * Currently, the content is loaded and sent down in one batch, streaming for requests is not supported.
 *
 * @return a ready {@link BinaryMemcacheRequest}.
 */
private static BinaryMemcacheRequest handleStoreRequest(final ChannelHandlerContext ctx,
        final BinaryStoreRequest msg) {
    ByteBuf extras = ctx.alloc().buffer(8);
    extras.writeInt(msg.flags());
    extras.writeInt(msg.expiration());

    byte[] key = msg.keyBytes();
    short keyLength = (short) key.length;
    byte extrasLength = (byte) extras.readableBytes();
    FullBinaryMemcacheRequest request = new DefaultFullBinaryMemcacheRequest(key, extras, msg.content());

    if (msg instanceof InsertRequest) {
        request.setOpcode(OP_INSERT);
    } else if (msg instanceof UpsertRequest) {
        request.setOpcode(OP_UPSERT);
    } else if (msg instanceof ReplaceRequest) {
        request.setOpcode(OP_REPLACE);
        request.setCAS(((ReplaceRequest) msg).cas());
    } else {
        throw new IllegalArgumentException("Unknown incoming BinaryStoreRequest type " + msg.getClass());
    }

    request.setKeyLength(keyLength);
    request.setTotalBodyLength(keyLength + msg.content().readableBytes() + extrasLength);
    request.setExtrasLength(extrasLength);
    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

/**
 * Encodes a {@link CounterRequest} into its lower level representation.
 *
 * Depending on if the {@link CounterRequest#delta} is positive or negative, either the incr or decr memcached
 * commands are utilized. The value is converted to its absolute variant to conform with the protocol.
 *
 * @return a ready {@link BinaryMemcacheRequest}.
 *//* w  ww . j a v  a2  s. c  o  m*/
private static BinaryMemcacheRequest handleCounterRequest(final ChannelHandlerContext ctx,
        final CounterRequest msg) {
    ByteBuf extras = ctx.alloc().buffer();
    extras.writeLong(Math.abs(msg.delta()));
    extras.writeLong(msg.initial());
    extras.writeInt(msg.expiry());

    byte[] key = msg.keyBytes();
    short keyLength = (short) key.length;
    byte extrasLength = (byte) extras.readableBytes();
    BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(key, extras);
    request.setOpcode(msg.delta() < 0 ? OP_COUNTER_DECR : OP_COUNTER_INCR);
    request.setKeyLength(keyLength);
    request.setTotalBodyLength(keyLength + extrasLength);
    request.setExtrasLength(extrasLength);
    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

/**
 * Encodes a {@link TouchRequest} into its lower level representation.
 *
 * @return a ready {@link BinaryMemcacheRequest}.
 *///  w  ww . j a v a 2 s.c  om
private static BinaryMemcacheRequest handleTouchRequest(final ChannelHandlerContext ctx,
        final TouchRequest msg) {
    ByteBuf extras = ctx.alloc().buffer();
    extras.writeInt(msg.expiry());

    byte[] key = msg.keyBytes();
    short keyLength = (short) key.length;
    byte extrasLength = (byte) extras.readableBytes();
    BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(key);
    request.setExtras(extras);
    request.setOpcode(OP_TOUCH);
    request.setKeyLength(keyLength);
    request.setTotalBodyLength(keyLength + extrasLength);
    request.setExtrasLength(extrasLength);
    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

/**
 * Encodes a {@link ObserveRequest} into its lower level representation.
 *
 * @return a ready {@link BinaryMemcacheRequest}.
 *///  ww w.j a  v a2 s  .c  o  m
private static BinaryMemcacheRequest handleObserveRequest(final ChannelHandlerContext ctx,
        final ObserveRequest msg) {
    String key = msg.key();
    short keyLength = (short) msg.keyBytes().length;
    ByteBuf content = ctx.alloc().buffer();
    content.writeShort(msg.partition());
    content.writeShort(keyLength);
    content.writeBytes(key.getBytes(CHARSET));

    BinaryMemcacheRequest request = new DefaultFullBinaryMemcacheRequest(EMPTY_BYTES, Unpooled.EMPTY_BUFFER,
            content);
    request.setOpcode(OP_OBSERVE);
    request.setTotalBodyLength(content.readableBytes());
    return request;
}

From source file:com.couchbase.client.core.endpoint.kv.KeyValueHandler.java

License:Apache License

private static BinaryMemcacheRequest handleObserveSeqnoRequest(final ChannelHandlerContext ctx,
        final ObserveSeqnoRequest msg) {
    ByteBuf content = ctx.alloc().buffer();
    content.writeLong(msg.vbucketUUID());

    BinaryMemcacheRequest request = new DefaultFullBinaryMemcacheRequest(EMPTY_BYTES, Unpooled.EMPTY_BUFFER,
            content);//from w  w w .  j a v a  2  s.co m
    request.setOpcode(OP_OBSERVE_SEQ);
    request.setTotalBodyLength(content.readableBytes());
    return request;
}