1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.impl.socket
import arrow.core.Option
import arrow.effects.IO
import io.netty.handler.ssl.SslContext
import org.onap.dcae.collectors.veshv.boundary.CollectorProvider
import org.onap.dcae.collectors.veshv.boundary.Server
import org.onap.dcae.collectors.veshv.model.ServerConfiguration
import org.onap.dcae.collectors.veshv.ssl.boundary.ServerSslContextFactory
import org.onap.dcae.collectors.veshv.utils.NettyServerHandle
import org.onap.dcae.collectors.veshv.utils.ServerHandle
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.reactivestreams.Publisher
import reactor.core.publisher.Mono
import reactor.ipc.netty.ByteBufFlux
import reactor.ipc.netty.NettyInbound
import reactor.ipc.netty.NettyOutbound
import reactor.ipc.netty.options.ServerOptions
import reactor.ipc.netty.tcp.TcpServer
import java.time.Duration
import java.util.function.BiFunction
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
internal class NettyTcpServer(private val serverConfig: ServerConfiguration,
private val sslContextFactory: ServerSslContextFactory,
private val collectorProvider: CollectorProvider) : Server {
override fun start(): IO<ServerHandle> = IO {
val ctx = TcpServer.builder()
.options(this::configureServer)
.build()
.start(BiFunction<NettyInbound, NettyOutbound, Publisher<Void>> { input, _ ->
handleConnection(input)
})
NettyServerHandle(ctx)
}
private fun configureServer(opts: ServerOptions.Builder<*>) {
val sslContext: Option<SslContext> = sslContextFactory.createSslContext(serverConfig.securityConfiguration)
if (sslContext.isDefined()) opts.sslContext(sslContext.orNull())
opts.port(serverConfig.listenPort)
}
private fun handleConnection(nettyInbound: NettyInbound): Mono<Void> =
collectorProvider().fold(
{
logger.warn { "Collector not ready. Closing connection from ${nettyInbound.remoteAddress()}..." }
Mono.empty()
},
{
logger.info { "Handling connection from ${nettyInbound.remoteAddress()}" }
it.handleConnection(nettyInbound.context().channel().alloc(), createDataStream(nettyInbound))
}
)
fun createDataStream(nettyInbound: NettyInbound): ByteBufFlux = nettyInbound
.configureIdleTimeout(serverConfig.idleTimeout)
.logConnectionClosed()
.receive()
.retain()
private fun NettyInbound.configureIdleTimeout(timeout: Duration): NettyInbound {
onReadIdle(timeout.toMillis()) {
logger.info {
"Idle timeout of ${timeout.seconds} s reached. Closing connection from ${remoteAddress()}..."
}
disconnectClient()
}
return this
}
private fun NettyInbound.disconnectClient() {
context().channel().close().addListener {
if (it.isSuccess)
logger.debug { "Channel (${remoteAddress()}) closed successfully." }
else
logger.warn("Channel close failed", it.cause())
}
}
private fun NettyInbound.logConnectionClosed(): NettyInbound {
context().onClose {
logger.info("Connection from ${remoteAddress()} has been closed")
}
return this
}
companion object {
private val logger = Logger(NettyTcpServer::class)
}
}
|
