forked from OpenFeign/feign
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathFeign.java
More file actions
230 lines (195 loc) · 6.97 KB
/
Feign.java
File metadata and controls
230 lines (195 loc) · 6.97 KB
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
/*
* Copyright 2012-2023 The Feign 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
*
* 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.
*/
package feign;
import feign.Request.Options;
import feign.Target.HardCodedTarget;
import feign.codec.Decoder;
import feign.codec.Encoder;
import feign.codec.ErrorDecoder;
import feign.InvocationHandlerFactory.MethodHandler;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
/**
* Feign's purpose is to ease development against http apis that feign restfulness. <br>
* In implementation, Feign is a {@link Feign#newInstance factory} for generating {@link Target
* targeted} http apis.
*/
public abstract class Feign {
public static Builder builder() {
return new Builder();
}
/**
* Configuration keys are formatted as unresolved <a href=
* "http://docs.oracle.com/javase/6/docs/jdk/api/javadoc/doclet/com/sun/javadoc/SeeTag.html" >see
* tags</a>. This method exposes that format, in case you need to create the same value as
* {@link MethodMetadata#configKey()} for correlation purposes.
*
* <p>
* Here are some sample encodings:
*
* <pre>
* <ul>
* <li>{@code
* Route53
* }: would match a class {@code
* route53.Route53
* }</li>
* <li>{@code Route53#list()}: would match a method {@code route53.Route53#list()}</li>
* <li>{@code Route53#listAt(Marker)}: would match a method {@code
* route53.Route53#listAt(Marker)}</li>
* <li>{@code Route53#listByNameAndType(String, String)}: would match a method {@code
* route53.Route53#listAt(String, String)}</li>
* </ul>
* </pre>
*
* Note that there is no whitespace expected in a key!
*
* @param targetType {@link feign.Target#type() type} of the Feign interface.
* @param method invoked method, present on {@code type} or its super.
* @see MethodMetadata#configKey()
*/
public static String configKey(Class targetType, Method method) {
StringBuilder builder = new StringBuilder();
builder.append(targetType.getSimpleName());
builder.append('#').append(method.getName()).append('(');
for (Type param : method.getGenericParameterTypes()) {
param = Types.resolve(targetType, targetType, param);
builder.append(Types.getRawType(param).getSimpleName()).append(',');
}
if (method.getParameterTypes().length > 0) {
builder.deleteCharAt(builder.length() - 1);
}
return builder.append(')').toString();
}
/**
* @deprecated use {@link #configKey(Class, Method)} instead.
*/
@Deprecated
public static String configKey(Method method) {
return configKey(method.getDeclaringClass(), method);
}
/**
* Returns a new instance of an HTTP API, defined by annotations in the {@link Feign Contract},
* for the specified {@code target}. You should cache this result.
*/
public abstract <T> T newInstance(Target<T> target);
public static class Builder extends BaseBuilder<Builder> {
private Client client = new Client.Default(null, null);
@Override
public Builder logLevel(Logger.Level logLevel) {
return super.logLevel(logLevel);
}
@Override
public Builder contract(Contract contract) {
return super.contract(contract);
}
public Builder client(Client client) {
this.client = client;
return this;
}
@Override
public Builder retryer(Retryer retryer) {
return super.retryer(retryer);
}
@Override
public Builder logger(Logger logger) {
return super.logger(logger);
}
@Override
public Builder encoder(Encoder encoder) {
return super.encoder(encoder);
}
@Override
public Builder decoder(Decoder decoder) {
return super.decoder(decoder);
}
@Override
public Builder queryMapEncoder(QueryMapEncoder queryMapEncoder) {
return super.queryMapEncoder(queryMapEncoder);
}
@Override
public Builder mapAndDecode(ResponseMapper mapper, Decoder decoder) {
return super.mapAndDecode(mapper, decoder);
}
@Deprecated
@Override
public Builder decode404() {
return super.decode404();
}
@Override
public Builder errorDecoder(ErrorDecoder errorDecoder) {
return super.errorDecoder(errorDecoder);
}
@Override
public Builder options(Options options) {
return super.options(options);
}
@Override
public Builder requestInterceptor(RequestInterceptor requestInterceptor) {
return super.requestInterceptor(requestInterceptor);
}
@Override
public Builder requestInterceptors(Iterable<RequestInterceptor> requestInterceptors) {
return super.requestInterceptors(requestInterceptors);
}
@Override
public Builder invocationHandlerFactory(InvocationHandlerFactory invocationHandlerFactory) {
return super.invocationHandlerFactory(invocationHandlerFactory);
}
@Override
public Builder doNotCloseAfterDecode() {
return super.doNotCloseAfterDecode();
}
@Override
public Builder exceptionPropagationPolicy(ExceptionPropagationPolicy propagationPolicy) {
return super.exceptionPropagationPolicy(propagationPolicy);
}
@Override
public Builder addCapability(Capability capability) {
return super.addCapability(capability);
}
public <T> T target(Class<T> apiType, String url) {
return target(new HardCodedTarget<>(apiType, url));
}
public <T> T target(Target<T> target) {
return build().newInstance(target);
}
public Feign build() {
super.enrich();
final ResponseHandler responseHandler =
new ResponseHandler(logLevel, logger, decoder, errorDecoder,
dismiss404, closeAfterDecode, responseInterceptor);
MethodHandler.Factory<Object> methodHandlerFactory =
new SynchronousMethodHandler.Factory(client, retryer, requestInterceptors,
responseHandler, logger, logLevel, propagationPolicy,
new RequestTemplateFactoryResolver(encoder, queryMapEncoder),
options);
return new ReflectiveFeign<>(contract, methodHandlerFactory, invocationHandlerFactory,
() -> null);
}
}
public static class ResponseMappingDecoder implements Decoder {
private final ResponseMapper mapper;
private final Decoder delegate;
public ResponseMappingDecoder(ResponseMapper mapper, Decoder decoder) {
this.mapper = mapper;
this.delegate = decoder;
}
@Override
public Object decode(Response response, Type type) throws IOException {
return delegate.decode(mapper.map(response, type), type);
}
}
}