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
|
/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2019 AT&T Intellectual Property. All rights reserved.
* Copyright © 2019 Amdocs
* ================================================================================
* 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.aai.schemaif.json;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.onap.aai.schemaif.SchemaProvider;
import org.onap.aai.schemaif.SchemaProviderException;
import org.onap.aai.schemaif.SchemaProviderMsgs;
import org.onap.aai.schemaif.definitions.EdgeSchema;
import org.onap.aai.schemaif.definitions.VertexSchema;
import org.onap.aai.schemaif.json.definitions.JsonEdgeSchema;
import org.onap.aai.schemaif.json.definitions.JsonSchema;
import org.onap.aai.schemaif.json.definitions.JsonVertexSchema;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
public class JsonSchemaProvider implements SchemaProvider {
Logger logger = LoggerFactory.getInstance().getLogger(JsonSchemaProvider.class.getName());
private JsonSchemaProviderConfig config;
private Map<String,SchemaInstance> schemaCache = new ConcurrentHashMap<>();
private RestTemplate restTemplate = null;
public JsonSchemaProvider(JsonSchemaProviderConfig config) {
this.config = config;
SecureClientHttpRequestFactory fac = new SecureClientHttpRequestFactory(config);
fac.setBufferRequestBody(false);
this.restTemplate = new RestTemplate(fac);
}
@Override
public void loadSchema() throws SchemaProviderException {
// Load the latest schema version
fetchSchemaVersion(getLatestSchemaVersion());
}
@Override
public String getLatestSchemaVersion() throws SchemaProviderException {
return "v0";
}
@Override
public VertexSchema getVertexSchema(String vertexName, String schemaVersion) throws SchemaProviderException {
SchemaInstance inst = getSchemaVersion(schemaVersion);
return inst.getVertexSchema(vertexName);
}
@Override
public EdgeSchema getEdgeSchema(String edgeType, String sourceVertex, String targetVertex, String version)
throws SchemaProviderException {
SchemaInstance inst = getSchemaVersion(version);
return inst.getEdgeSchema(sourceVertex, targetVertex, edgeType);
}
@Override
public Set<EdgeSchema> getAdjacentEdgeSchema(String vertexType, String version) throws SchemaProviderException {
SchemaInstance inst = getSchemaVersion(version);
Set<EdgeSchema> edgeList = inst.getEdgeSchema(vertexType);
if (edgeList == null) {
edgeList = new HashSet<>();
}
return edgeList;
}
@Override
public Set<EdgeSchema> getEdgeSchemaForSourceTarget(String sourceType, String targetType, String version)
throws SchemaProviderException {
SchemaInstance inst = getSchemaVersion(version);
Set<EdgeSchema> edgeList = inst.getEdgeSchemas(sourceType, targetType);
if (edgeList == null) {
edgeList = new HashSet<>();
}
return edgeList;
}
public void loadSchema(String payload, String version) throws SchemaProviderException {
JsonSchema jsonSchema = JsonSchema.fromJson(payload);
SchemaInstance schemaInst = new SchemaInstance();
for (JsonVertexSchema jsonVertex : jsonSchema.getNodeTypes()) {
FromJsonVertexSchema vSchema = new FromJsonVertexSchema();
vSchema.fromJson(jsonVertex, jsonSchema.getDataTypes(), jsonSchema.getCommonProperties());
schemaInst.addVertex(vSchema);
}
for (JsonEdgeSchema jsonEdge : jsonSchema.getRelationshipTypes()) {
FromJsonEdgeSchema eSchema = new FromJsonEdgeSchema();
eSchema.fromJson(jsonEdge);
schemaInst.addEdge(eSchema);
}
schemaCache.put(version, schemaInst);
}
private synchronized void fetchSchemaVersion(String version) throws SchemaProviderException {
if (schemaCache.get(version) != null) {
return;
}
String url = config.getSchemaServiceBaseUrl() + "/" + version;
HttpHeaders headers = new HttpHeaders();
headers.put("X-FromAppId", Arrays.asList(config.getServiceName()));
headers.put("X-TransactionId", Arrays.asList(java.util.UUID.randomUUID().toString()));
headers.setAccept(Arrays.asList(org.springframework.http.MediaType.APPLICATION_OCTET_STREAM));
HttpEntity <String> entity = new HttpEntity<>(headers);
ResponseEntity<byte[]> response = restTemplate.exchange(url, HttpMethod.GET, entity, byte[].class);
if (response.getStatusCodeValue() == HttpStatus.NOT_FOUND.value()) {
logger.warn(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "version " + version + " not found");
throw new SchemaProviderException("Schema version " + version + " not found");
}
else if (response.getStatusCodeValue() != HttpStatus.OK.value()) {
logger.error(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "failed to load version " + version + ": " + response.getBody());
throw new SchemaProviderException("Error getting schema version " + version + ":" + response.getBody());
}
try {
SchemaServiceResponse resp = SchemaServiceResponse.fromJson(unzipAndGetJSONString(response));
loadSchema(resp.getData().toJson(), version);
}
catch (Exception ex) {
StringWriter writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
ex.printStackTrace(printWriter);
logger.error(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "failed to load version " + version + ": "
+ response.getBody() + "\n" + writer.toString());
throw new SchemaProviderException("Error loading schema version " + version + ":" + ex.getMessage());
}
logger.info(SchemaProviderMsgs.LOADED_SCHEMA_FILE, version);
}
private String unzipAndGetJSONString(ResponseEntity<byte[]> response) throws IOException {
StringBuffer sb = new StringBuffer("");
ZipInputStream zipStream = null;
try {
zipStream = new ZipInputStream(new ByteArrayInputStream(response.getBody()));
ZipEntry entry = null;
while ((entry = zipStream.getNextEntry()) != null) {
Scanner sc = new Scanner(zipStream);
while (sc.hasNextLine()) {
sb.append(sc.nextLine());
}
}
} finally {
try {
if (zipStream != null) {
zipStream.closeEntry();
zipStream.close();
}
} catch (Exception e) {
logger.warn(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, e.toString());
}
}
return sb.toString();
}
private SchemaInstance getSchemaVersion(String version) throws SchemaProviderException {
// TODO: For now, we are only supporting a single version of the schema. Load that
// version regardless of what the client asks for.
String versionToLoad = getLatestSchemaVersion();
SchemaInstance inst = schemaCache.get(versionToLoad);
if (inst == null) {
fetchSchemaVersion(versionToLoad);
inst = schemaCache.get(versionToLoad);
if (inst == null) {
throw new SchemaProviderException("Unable to find schema version " + versionToLoad);
}
}
return inst;
}
@Override
public Map<String, VertexSchema> getVertexMap(String schemaVersion) throws SchemaProviderException {
return getSchemaVersion(schemaVersion).getVertexMap();
}
}
|
