forked from OpenFeign/feign
-
Notifications
You must be signed in to change notification settings - Fork 0
<
8000
div class="CodeViewFileTreeLayout-module__sidebar__n_Aau" tabindex="0">
Expand file tree
/
Copy pathMethodHandler.java
More file actions
185 lines (165 loc) · 7.16 KB
/
MethodHandler.java
File metadata and controls
185 lines (165 loc) · 7.16 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
/*
* Copyright 2013 Netflix, Inc.
*
* 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.codec.DecodeException;
import feign.codec.Decoder;
import feign.codec.ErrorDecoder;
import javax.inject.Inject;
import javax.inject.Provider;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import static feign.FeignException.errorExecuting;
import static feign.FeignException.errorReading;
import static feign.Util.checkNotNull;
import static feign.Util.ensureClosed;
interface MethodHandler {
Object invoke(Object[] argv) throws Throwable;
static class Factory {
private final Client client;
private final Provider<Retryer> retryer;
private final Set<RequestInterceptor> requestInterceptors;
private final Logger logger;
private final Provider<Logger.Level> logLevel;
@Inject Factory(Client client, Provider<Retryer> retryer, Set<RequestInterceptor> requestInterceptors,
Logger logger, Provider<Logger.Level> logLevel) {
this.client = checkNotNull(client, "client");
this.retryer = checkNotNull(retryer, "retryer");
this.requestInterceptors = checkNotNull(requestInterceptors, "requestInterceptors");
this.logger = checkNotNull(logger, "logger");
this.logLevel = checkNotNull(logLevel, "logLevel");
}
public MethodHandler create(Target<?> target, MethodMetadata md, BuildTemplateFromArgs buildTemplateFromArgs,
Options options, Decoder decoder, ErrorDecoder errorDecoder) {
return new SynchronousMethodHandler(target, client, retryer, requestInterceptors, logger, logLevel, md,
buildTemplateFromArgs, options, decoder, errorDecoder);
}
}
/**
* Those using guava will implement as {@code Function<Object[], RequestTemplate>}.
*/
interface BuildTemplateFromArgs {
public RequestTemplate apply(Object[] argv);
}
static final class SynchronousMethodHandler implements MethodHandler {
private final MethodMetadata metadata;
private final Target<?> target;
private final Client client;
private final Provider<Retryer> retryer;
private final Set<RequestInterceptor> requestInterceptors;
private final Logger logger;
private final Provider<Logger.Level> logLevel;
private final BuildTemplateFromArgs buildTemplateFromArgs;
private final Options options;
private final Decoder decoder;
private final ErrorDecoder errorDecoder;
private SynchronousMethodHandler(Target<?> target, Client client, Provider<Retryer> retryer,
Set<RequestInterceptor> requestInterceptors, Logger logger,
Provider<Logger.Level> logLevel, MethodMetadata metadata,
BuildTemplateFromArgs buildTemplateFromArgs, Options options,
Decoder decoder, ErrorDecoder errorDecoder) {
this.target = checkNotNull(target, "target");
this.client = checkNotNull(client, "client for %s", target);
this.retryer = checkNotNull(retryer, "retryer for %s", target);
this.requestInterceptors = checkNotNull(requestInterceptors, "requestInterceptors for %s", target);
this.logger = checkNotNull(logger, "logger for %s", target);
this.logLevel = checkNotNull(logLevel, "logLevel for %s", target);
this.metadata = checkNotNull(metadata, "metadata for %s", target);
this.buildTemplateFromArgs = checkNotNull(buildTemplateFromArgs, "metadata for %s", target);
this.options = checkNotNull(options, "options for %s", target);
this.errorDecoder = checkNotNull(errorDecoder, "errorDecoder for %s", target);
this.decoder = checkNotNull(decoder, "decoder for %s", target);
}
@Override public Object invoke(Object[] argv) throws Throwable {
RequestTemplate template = buildTemplateFromArgs.apply(argv);
Retryer retryer = this.retryer.get();
while (true) {
try {
return executeAndDecode(template);
} catch (RetryableException e) {
retryer.continueOrPropagate(e);
if (logLevel.get() != Logger.Level.NONE) {
logger.logRetry(metadata.configKey(), logLevel.get());
}
continue;
}
}
}
Object executeAndDecode(RequestTemplate template) throws Throwable {
Request request = targetRequest(template);
if (logLevel.get() != Logger.Level.NONE) {
logger.logRequest(metadata.configKey(), logLevel.get(), request);
}
Response response;
long start = System.nanoTime();
try {
response = client.execute(request, options);
} catch (IOException e) {
if (logLevel.get() != Logger.Level.NONE) {
logger.logIOException(metadata.configKey(), logLevel.get(), e, elapsedTime(start));
}
throw errorExecuting(request, e);
}
long elapsedTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
try {
if (logLevel.get() != Logger.Level.NONE) {
response = logger.logAndRebufferResponse(metadata.configKey(), logLevel.get(), response, elapsedTime);
}
if (response.status() >= 200 && response.status() < 300) {
if (Response.class == metadata.returnType()) {
if (response.body() == null) {
return response;
}
String bodyString = Util.toString(response.body().asReader());
return Response.create(response.status(), response.reason(), response.headers(), bodyString);
} else if (void.class == metadata.returnType()) {
return null;
} else {
return decode(response);
}
} else {
throw errorDecoder.decode(metadata.configKey(), response);
}
} catch (IOException e) {
if (logLevel.get() != Logger.Level.NONE) {
logger.logIOException(metadata.configKey(), logLevel.get(), e, elapsedTime);
}
throw errorReading(request, response, e);
} finally {
ensureClosed(response.body());
}
}
long elapsedTime(long start) {
return TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - start);
}
Request targetRequest(RequestTemplate template) {
for (RequestInterceptor interceptor : requestInterceptors) {
interceptor.apply(template);
}
return target.apply(new RequestTemplate(template));
}
Object decode(Response response) throws Throwable {
try {
return decoder.decode(response, metadata.returnType());
} catch (FeignException e) {
throw e;
} catch (RuntimeException e) {
throw new DecodeException(e.getMessage(), e);
}
}
}
}