Examples of io.netty.buffer.ByteBuf.readableBytes()

io.netty.buffer.ByteBuf.readableBytes()
Returns the number of readable bytes which is equal to {@code (this.writerIndex - this.readerIndex)}.

            extras = Unpooled.EMPTY_BUFFER;
        }


        String key = msg.key();
        short keyLength = (short) key.length();
        byte extrasLength = (byte) extras.readableBytes();
        BinaryMemcacheRequest request = new DefaultBinaryMemcacheRequest(key);
        request
            .setOpcode(opcode)
            .setKeyLength(keyLength)
            .setExtras(extras)

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        extras.writeInt(msg.flags());
        extras.writeInt(msg.expiration());


        String key = msg.key();
        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) {

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        extras.writeLong(msg.initial());
        extras.writeInt(msg.expiry());


        String key = msg.key();
        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);

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        ByteBuf extras = ctx.alloc().buffer();
        extras.writeInt(msg.expiry());


        String key = msg.key();
        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);

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        content.writeShort(key.length());
        content.writeBytes(key.getBytes(CHARSET));


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


    private static BinaryMemcacheRequest handleAppendRequest(final AppendRequest msg) {
        String key = msg.key();

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            payload
        );
        initialRequest
            .setOpcode(SASL_AUTH_OPCODE)
            .setKeyLength((short) mechanismLength)
            .setTotalBodyLength(mechanismLength + payload.readableBytes());


        ctx.writeAndFlush(initialRequest);
    }


    /**

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                content
            );
            stepRequest
                .setOpcode(SASL_STEP_OPCODE)
                .setKeyLength((short) selectedMechanism.length())
                .setTotalBodyLength(content.readableBytes() + selectedMechanism.length());


            ctx.writeAndFlush(stepRequest);
        } else {
            throw new AuthenticationException("SASL Challenge evaluation returned null.");
        }

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        if (content == null) {
            content =  Unpooled.buffer(0);
        }
        FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, method, path.toString(), content);
        request.headers().set(HttpHeaders.Names.USER_AGENT, env().userAgent());
        request.headers().set(HttpHeaders.Names.CONTENT_LENGTH, content.readableBytes());
        request.headers().set(HttpHeaders.Names.CONTENT_TYPE, "application/json");
        addAuth(ctx, request, msg.bucket(), msg.password());


        return request;
    }

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            for (TempData out : streamsWithData) {
                metaBuffer.writeInt(bodyOffset); //TODO - reconsider how frequently this shortcut is placed on disk
                metaBuffer.writeInt(out.snapshotLength);
                bodyOffset += out.snapshotLength;
            }
            while (metaBuffer.readableBytes() > 0) {
                metaBuffer.readBytes(openWriteFile, metaBuffer.readableBytes());
            }
            metaBuffer.release();
            /* write bytes for each stream id */
            for (TempData out : streamsWithData) {

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                metaBuffer.writeInt(bodyOffset); //TODO - reconsider how frequently this shortcut is placed on disk
                metaBuffer.writeInt(out.snapshotLength);
                bodyOffset += out.snapshotLength;
            }
            while (metaBuffer.readableBytes() > 0) {
                metaBuffer.readBytes(openWriteFile, metaBuffer.readableBytes());
            }
            metaBuffer.release();
            /* write bytes for each stream id */
            for (TempData out : streamsWithData) {
                synchronized (out.stream) {     // need less confusing variable names for concurrency

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