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
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.binding.sca.provider;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.SCABinding;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.databinding.Mediator;
import org.apache.tuscany.sca.interfacedef.Compatibility;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.provider.EndpointReferenceAsyncProvider;
import org.apache.tuscany.sca.provider.EndpointReferenceProvider;
import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.apache.tuscany.sca.runtime.RuntimeEndpointReference;
import org.oasisopen.sca.ServiceRuntimeException;
import org.oasisopen.sca.ServiceUnavailableException;
/**
* The sca reference binding provider mediates between the twin requirements of
* local sca bindings and remote sca bindings. In the local case is does
* very little. When the sca binding model is set as being remote (because a
* reference target can't be resolved in the current model) this binding will
* try and create a remote connection to it
*
* @version $Rev$ $Date$
*/
public class RuntimeSCAReferenceBindingProvider implements EndpointReferenceAsyncProvider {
private RuntimeEndpointReference endpointReference;
private RuntimeComponent component;
private RuntimeComponentReference reference;
private SCABinding binding;
private boolean remotable;
private boolean started = false;
private ReferenceBindingProvider distributedProvider;
private Mediator mediator;
private InterfaceContractMapper interfaceContractMapper;
private SCABindingMapper scaBindingMapper;
public RuntimeSCAReferenceBindingProvider(ExtensionPointRegistry extensionPoints,
RuntimeEndpointReference endpointReference) {
this.endpointReference = endpointReference;
this.component = (RuntimeComponent)endpointReference.getComponent();
this.reference = (RuntimeComponentReference)endpointReference.getReference();
this.binding = (SCABinding)endpointReference.getBinding();
UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
this.mediator = utilities.getUtility(Mediator.class);
this.interfaceContractMapper = utilities.getUtility(InterfaceContractMapper.class);
this.scaBindingMapper = utilities.getUtility(SCABindingMapper.class);
remotable = isTargetRemote();
getDistributedProvider();
}
private boolean isTargetRemote() {
return endpointReference.getTargetEndpoint().isRemote();
}
private ReferenceBindingProvider getDistributedProvider() {
if (remotable) {
// initialize the remote provider if it hasn't been done already
if (distributedProvider == null) {
if (reference.getInterfaceContract() != null && !reference.getInterfaceContract().getInterface()
.isRemotable()) {
throw new ServiceRuntimeException("Reference interface not remotable for component: " + component
.getName()
+ " and reference: "
+ reference.getName());
}
if (scaBindingMapper.isRemotable(endpointReference)) {
distributedProvider =
new DelegatingSCAReferenceBindingProvider(endpointReference, scaBindingMapper);
}
}
}
return distributedProvider;
}
public InterfaceContract getBindingInterfaceContract() {
if (remotable && distributedProvider != null) {
return distributedProvider.getBindingInterfaceContract();
} else {
// Check if there is a target
RuntimeEndpoint endpoint = (RuntimeEndpoint)endpointReference.getTargetEndpoint();
if (endpoint != null) {
return endpoint.getComponentTypeServiceInterfaceContract();
} else {
return endpointReference.getComponentTypeReferenceInterfaceContract();
}
}
}
public boolean supportsOneWayInvocation() {
if (remotable && distributedProvider != null) {
return distributedProvider.supportsOneWayInvocation();
} else {
return false;
}
}
private Invoker getInvoker(RuntimeEndpointReference epr, Operation operation) {
Endpoint target = epr.getTargetEndpoint();
if (target != null) {
RuntimeComponentService service = (RuntimeComponentService)target.getService();
if (service != null) { // not a callback wire
InvocationChain chain = ((RuntimeEndpoint)target).getInvocationChain(operation);
boolean passByValue = false;
Operation targetOp = chain.getTargetOperation();
if (!operation.getInterface().isRemotable()) {
if (interfaceContractMapper.isCompatibleByReference(operation, targetOp, Compatibility.SUBSET)) {
passByValue = false;
}
} else {
// boolean allowsPBR = chain.allowsPassByReference(); TODO: TUSCANY-3479 this breaks the conformance tests as it needs to consider _both_ ends
boolean allowsPBR = false;
if (allowsPBR && interfaceContractMapper.isCompatibleByReference(operation,
targetOp,
Compatibility.SUBSET)) {
passByValue = false;
} else if (interfaceContractMapper.isCompatibleByValue(operation, targetOp, Compatibility.SUBSET)) {
passByValue = true;
}
}
// it turns out that the chain source and target operations are the same, and are the operation
// from the target, not sure if thats by design or a bug. The SCA binding invoker needs to know
// the source and target class loaders so pass in the real source operation in the constructor
return chain == null ? null : new SCABindingInvoker(chain, operation, mediator, passByValue, epr);
}
}
return null;
}
public Invoker createInvoker(Operation operation) {
if (remotable && distributedProvider != null) {
return distributedProvider.createInvoker(operation);
} else {
Invoker invoker = getInvoker(endpointReference, operation);
if (invoker == null) {
throw new ServiceUnavailableException(
"Unable to create SCA binding invoker for local target " + component
.getName()
+ " reference "
+ reference.getName()
+ " (bindingURI="
+ binding.getURI()
+ " operation="
+ operation.getName()
+ ")");
}
return invoker;
}
}
public void start() {
if (started) {
return;
}
if (distributedProvider != null) {
distributedProvider.start();
}
started = true;
}
public void stop() {
if (!started) {
return;
}
try {
if (distributedProvider != null) {
distributedProvider.stop();
}
} finally {
started = false;
}
}
public void configure() {
if (distributedProvider instanceof EndpointReferenceProvider) {
((EndpointReferenceProvider)distributedProvider).configure();
}
}
public boolean supportsNativeAsync() {
return true;
}
}
|
