forked from spring-projects/spring-framework
/
DefaultRSocketRequesterBuilder.java
348 lines (282 loc) · 11.7 KB
/
DefaultRSocketRequesterBuilder.java
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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
/*
* Copyright 2002-2020 the original author or authors.
*
* 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
*
* https://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.
*/
package org.springframework.messaging.rsocket;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import java.util.function.Function;
import io.rsocket.Payload;
import io.rsocket.RSocket;
import io.rsocket.frame.decoder.PayloadDecoder;
import io.rsocket.metadata.WellKnownMimeType;
import io.rsocket.transport.ClientTransport;
import io.rsocket.transport.netty.client.TcpClientTransport;
import io.rsocket.transport.netty.client.WebsocketClientTransport;
import io.rsocket.util.DefaultPayload;
import reactor.core.publisher.Mono;
import org.springframework.core.ReactiveAdapter;
import org.springframework.core.ResolvableType;
import org.springframework.core.codec.Decoder;
import org.springframework.core.codec.Encoder;
import org.springframework.core.codec.StringDecoder;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.CollectionUtils;
import org.springframework.util.MimeType;
import org.springframework.util.MimeTypeUtils;
/**
* Default implementation of {@link RSocketRequester.Builder}.
*
* @author Brian Clozel
* @author Rossen Stoyanchev
* @since 5.2
*/
final class DefaultRSocketRequesterBuilder implements RSocketRequester.Builder {
private final static boolean rsocketConnectorPresent =
ClassUtils.isPresent("io.rsocket.core.RSocketConnector",
DefaultRSocketRequesterBuilder.class.getClassLoader());
private static final Map<String, Object> HINTS = Collections.emptyMap();
private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
private static final Payload EMPTY_SETUP_PAYLOAD = DefaultPayload.create(EMPTY_BYTE_ARRAY);
@Nullable
private MimeType dataMimeType;
@Nullable
private MimeType metadataMimeType;
@Nullable
private Object setupData;
@Nullable
private String setupRoute;
@Nullable
private Object[] setupRouteVars;
@Nullable
private Map<Object, MimeType> setupMetadata;
@Nullable
private RSocketStrategies strategies;
private List<Consumer<RSocketStrategies.Builder>> strategiesConfigurers = new ArrayList<>();
private List<RSocketConnectorConfigurer> rsocketConnectorConfigurers = new ArrayList<>();
@SuppressWarnings("deprecation")
private List<ClientRSocketFactoryConfigurer> rsocketFactoryConfigurers = new ArrayList<>();
@Override
public RSocketRequester.Builder dataMimeType(@Nullable MimeType mimeType) {
this.dataMimeType = mimeType;
return this;
}
@Override
public RSocketRequester.Builder metadataMimeType(MimeType mimeType) {
Assert.notNull(mimeType, "`metadataMimeType` is required");
this.metadataMimeType = mimeType;
return this;
}
@Override
public RSocketRequester.Builder setupData(Object data) {
this.setupData = data;
return this;
}
@Override
public RSocketRequester.Builder setupRoute(String route, Object... routeVars) {
this.setupRoute = route;
this.setupRouteVars = routeVars;
return this;
}
@Override
public RSocketRequester.Builder setupMetadata(Object metadata, @Nullable MimeType mimeType) {
this.setupMetadata = (this.setupMetadata == null ? new LinkedHashMap<>(4) : this.setupMetadata);
this.setupMetadata.put(metadata, mimeType);
return this;
}
@Override
public RSocketRequester.Builder rsocketStrategies(@Nullable RSocketStrategies strategies) {
this.strategies = strategies;
return this;
}
@Override
public RSocketRequester.Builder rsocketStrategies(Consumer<RSocketStrategies.Builder> configurer) {
this.strategiesConfigurers.add(configurer);
return this;
}
@Override
public RSocketRequester.Builder rsocketConnector(RSocketConnectorConfigurer configurer) {
this.rsocketConnectorConfigurers.add(configurer);
return this;
}
@Override
@Deprecated
public RSocketRequester.Builder rsocketFactory(ClientRSocketFactoryConfigurer configurer) {
this.rsocketFactoryConfigurers.add(configurer);
return this;
}
@Override
public RSocketRequester.Builder apply(Consumer<RSocketRequester.Builder> configurer) {
configurer.accept(this);
return this;
}
@Override
public Mono<RSocketRequester> connectTcp(String host, int port) {
return connect(TcpClientTransport.create(host, port));
}
@Override
public Mono<RSocketRequester> connectWebSocket(URI uri) {
return connect(WebsocketClientTransport.create(uri));
}
@Override
public Mono<RSocketRequester> connect(ClientTransport transport) {
RSocketStrategies rsocketStrategies = getRSocketStrategies();
Assert.isTrue(!rsocketStrategies.encoders().isEmpty(), "No encoders");
Assert.isTrue(!rsocketStrategies.decoders().isEmpty(), "No decoders");
MimeType metaMimeType = this.metadataMimeType != null ? this.metadataMimeType :
MimeTypeUtils.parseMimeType(WellKnownMimeType.MESSAGE_RSOCKET_COMPOSITE_METADATA.getString());
MimeType dataMimeType = getDataMimeType(rsocketStrategies);
Mono<Payload> setupPayload = getSetupPayload(dataMimeType, metaMimeType, rsocketStrategies);
Function<Payload, Mono<RSocket>> connectFunction;
if (rsocketConnectorPresent) {
connectFunction = payload -> new RSocketConnectorHelper().getRSocketMono(
this.rsocketConnectorConfigurers, this.rsocketFactoryConfigurers,
metaMimeType, dataMimeType, setupPayload, rsocketStrategies, transport, payload);
}
else {
connectFunction = payload -> new RSocketFactoryHelper().getRSocketMono(
this.rsocketFactoryConfigurers, metaMimeType, dataMimeType,
setupPayload, rsocketStrategies, transport, payload);
}
// In RSocket 1.0.2 we can pass a Mono for the setup Payload. Until then we have to
// resolve it and then cache the Mono<RSocket> because it may be a ReconnectMono.
return setupPayload
.map(connectFunction)
.cache()
.flatMap(mono -> mono.map(rsocket ->
new DefaultRSocketRequester(rsocket, dataMimeType, metaMimeType, rsocketStrategies)));
}
private RSocketStrategies getRSocketStrategies() {
if (!this.strategiesConfigurers.isEmpty()) {
RSocketStrategies.Builder builder =
this.strategies != null ? this.strategies.mutate() : RSocketStrategies.builder();
this.strategiesConfigurers.forEach(c -> c.accept(builder));
return builder.build();
}
else {
return this.strategies != null ? this.strategies : RSocketStrategies.builder().build();
}
}
private MimeType getDataMimeType(RSocketStrategies strategies) {
if (this.dataMimeType != null) {
return this.dataMimeType;
}
// First non-basic Decoder (e.g. CBOR, Protobuf)
for (Decoder<?> candidate : strategies.decoders()) {
if (!isCoreCodec(candidate) && !candidate.getDecodableMimeTypes().isEmpty()) {
return getMimeType(candidate);
}
}
// First core decoder (e.g. String)
for (Decoder<?> decoder : strategies.decoders()) {
if (!decoder.getDecodableMimeTypes().isEmpty()) {
return getMimeType(decoder);
}
}
throw new IllegalArgumentException("Failed to select data MimeType to use.");
}
private static boolean isCoreCodec(Object codec) {
return codec.getClass().getPackage().equals(StringDecoder.class.getPackage());
}
private static MimeType getMimeType(Decoder<?> decoder) {
MimeType mimeType = decoder.getDecodableMimeTypes().get(0);
return mimeType.getParameters().isEmpty() ? mimeType : new MimeType(mimeType, Collections.emptyMap());
}
private Mono<Payload> getSetupPayload(
MimeType dataMimeType, MimeType metaMimeType, RSocketStrategies strategies) {
Object data = this.setupData;
boolean hasMetadata = (this.setupRoute != null || !CollectionUtils.isEmpty(this.setupMetadata));
if (!hasMetadata && data == null) {
return Mono.just(EMPTY_SETUP_PAYLOAD);
}
Mono<DataBuffer> dataMono = Mono.empty();
if (data != null) {
ReactiveAdapter adapter = strategies.reactiveAdapterRegistry().getAdapter(data.getClass());
Assert.isTrue(adapter == null || !adapter.isMultiValue(), "Expected single value: " + data);
Mono<?> mono = (adapter != null ? Mono.from(adapter.toPublisher(data)) : Mono.just(data));
dataMono = mono.map(value -> {
ResolvableType type = ResolvableType.forClass(value.getClass());
Encoder<Object> encoder = strategies.encoder(type, dataMimeType);
Assert.notNull(encoder, () -> "No encoder for " + dataMimeType + ", " + type);
return encoder.encodeValue(value, strategies.dataBufferFactory(), type, dataMimeType, HINTS);
});
}
Mono<DataBuffer> metaMono = Mono.empty();
if (hasMetadata) {
metaMono = new MetadataEncoder(metaMimeType, strategies)
.metadataAndOrRoute(this.setupMetadata, this.setupRoute, this.setupRouteVars)
.encode();
}
Mono<DataBuffer> emptyBuffer = Mono.fromCallable(() ->
strategies.dataBufferFactory().wrap(EMPTY_BYTE_ARRAY));
dataMono = dataMono.switchIfEmpty(emptyBuffer);
metaMono = metaMono.switchIfEmpty(emptyBuffer);
return Mono.zip(dataMono, metaMono)
.map(tuple -> PayloadUtils.createPayload(tuple.getT1(), tuple.getT2()))
.doOnDiscard(DataBuffer.class, DataBufferUtils::release)
.doOnDiscard(Payload.class, Payload::release);
}
@SuppressWarnings("deprecation")
private static class RSocketConnectorHelper {
Mono<RSocket> getRSocketMono(List<RSocketConnectorConfigurer> connectorConfigurers,
List<ClientRSocketFactoryConfigurer> factoryConfigurers,
MimeType metaMimeType, MimeType dataMimeType, Mono<Payload> setupPayload,
RSocketStrategies rsocketStrategies, ClientTransport transport, Payload payload) {
io.rsocket.core.RSocketConnector connector = io.rsocket.core.RSocketConnector.create();
connectorConfigurers.forEach(c -> c.configure(connector));
if (!factoryConfigurers.isEmpty()) {
io.rsocket.RSocketFactory.ClientRSocketFactory factory =
new io.rsocket.RSocketFactory.ClientRSocketFactory(connector);
factoryConfigurers.forEach(c -> c.configure(factory));
}
if (rsocketStrategies.dataBufferFactory() instanceof NettyDataBufferFactory) {
connector.payloadDecoder(PayloadDecoder.ZERO_COPY);
}
connector.metadataMimeType(metaMimeType.toString());
connector.dataMimeType(dataMimeType.toString());
if (setupPayload != EMPTY_SETUP_PAYLOAD) {
connector.setupPayload(payload);
}
return connector.connect(transport);
}
}
@SuppressWarnings("deprecation")
private static class RSocketFactoryHelper {
Mono<RSocket> getRSocketMono(List<ClientRSocketFactoryConfigurer> configurers,
MimeType metaMimeType, MimeType dataMimeType, Mono<Payload> setupPayload,
RSocketStrategies rsocketStrategies, ClientTransport transport, Payload payload) {
io.rsocket.RSocketFactory.ClientRSocketFactory factory = io.rsocket.RSocketFactory.connect();
configurers.forEach(c -> c.configure(factory));
if (rsocketStrategies.dataBufferFactory() instanceof NettyDataBufferFactory) {
factory.frameDecoder(PayloadDecoder.ZERO_COPY);
}
factory.metadataMimeType(metaMimeType.toString());
factory.dataMimeType(dataMimeType.toString());
if (setupPayload != EMPTY_SETUP_PAYLOAD) {
factory.setupPayload(payload);
}
return factory.transport(transport).start();
}
}
}