1
|
package eu.dnetlib.data.information.oai.publisher.core;
|
2
|
|
3
|
import java.util.List;
|
4
|
|
5
|
import javax.annotation.Resource;
|
6
|
|
7
|
import org.apache.commons.logging.Log;
|
8
|
import org.apache.commons.logging.LogFactory;
|
9
|
import org.springframework.beans.factory.annotation.Autowired;
|
10
|
|
11
|
import eu.dnetlib.data.information.oai.publisher.CannotDisseminateFormatException;
|
12
|
import eu.dnetlib.data.information.oai.publisher.OaiPublisherException;
|
13
|
import eu.dnetlib.data.information.oai.publisher.conf.ISLookUpClient;
|
14
|
import eu.dnetlib.data.information.oai.publisher.conf.OAIConfigurationExistReader;
|
15
|
import eu.dnetlib.data.information.oai.publisher.info.ListDocumentsInfo;
|
16
|
import eu.dnetlib.data.information.oai.publisher.info.ListRecordsInfo;
|
17
|
import eu.dnetlib.data.information.oai.publisher.info.MDFInfo;
|
18
|
import eu.dnetlib.data.information.oai.publisher.info.RecordInfo;
|
19
|
import eu.dnetlib.data.information.oai.publisher.info.ResumptionToken;
|
20
|
import eu.dnetlib.data.information.oai.publisher.info.SetInfo;
|
21
|
import eu.dnetlib.data.information.oai.sets.SetCollection;
|
22
|
import eu.dnetlib.miscutils.cache.EhCache;
|
23
|
|
24
|
/**
|
25
|
* Core OAI servlet implementation.
|
26
|
*
|
27
|
* @author michele,alessia
|
28
|
*
|
29
|
*/
|
30
|
|
31
|
public abstract class AbstractOAICore {
|
32
|
|
33
|
private static final Log log = LogFactory.getLog(AbstractOAICore.class); // NOPMD by marko on 11/24/08 5:02 PM
|
34
|
|
35
|
private String currentDBName;
|
36
|
|
37
|
@Autowired
|
38
|
private SetCollection setCollection;
|
39
|
|
40
|
@Autowired
|
41
|
private OAIConfigurationExistReader oaiConfigurationExistReader;
|
42
|
|
43
|
@Autowired
|
44
|
private ISLookUpClient lookupClient;
|
45
|
|
46
|
@Resource
|
47
|
private EhCache<String, MDFInfo> mdFormatsCache;
|
48
|
|
49
|
/**
|
50
|
* page size.
|
51
|
*/
|
52
|
protected int pageSize = 100;
|
53
|
|
54
|
/**
|
55
|
* Returns informations about a record. It contains basic information about a record, such as "prefix", "identifier", "datestamp",
|
56
|
* "setspec", "metadata".
|
57
|
*
|
58
|
* @param identifier
|
59
|
* record identifier
|
60
|
* @param prefix
|
61
|
* metadata prefix
|
62
|
* @return a recordInfo instance
|
63
|
* @throws OaiPublisherException
|
64
|
* could happen
|
65
|
*/
|
66
|
public RecordInfo getInfoRecord(final String identifier, final String prefix) throws OaiPublisherException {
|
67
|
MDFInfo mdf = obtainMDFInfo(prefix);
|
68
|
return getRecordById(mdf, identifier);
|
69
|
}
|
70
|
|
71
|
/**
|
72
|
* List records.
|
73
|
*
|
74
|
* @param onlyIdentifiers
|
75
|
* only return record identifiers
|
76
|
* @param metadataPrefix
|
77
|
* metadata prefix
|
78
|
* @param set
|
79
|
* set name
|
80
|
* @param from
|
81
|
* from date
|
82
|
* @param until
|
83
|
* to date
|
84
|
* @return ListRecordsInfo
|
85
|
* @throws OaiPublisherException
|
86
|
* could happen
|
87
|
*/
|
88
|
public ListRecordsInfo listRecords(final boolean onlyIdentifiers, final String metadataPrefix, final String set, final String from, final String until)
|
89
|
throws OaiPublisherException {
|
90
|
final ListRecordsInfo res = new ListRecordsInfo();
|
91
|
|
92
|
if (from != null) {
|
93
|
res.setFrom(from);
|
94
|
res.setWithSize(false);
|
95
|
}
|
96
|
if (until != null) {
|
97
|
res.setUntil(until);
|
98
|
res.setWithSize(false);
|
99
|
}
|
100
|
if (metadataPrefix != null) {
|
101
|
res.setMetadataprefix(metadataPrefix);
|
102
|
}
|
103
|
if (set != null) {
|
104
|
res.setSet(set);
|
105
|
}
|
106
|
|
107
|
ListDocumentsInfo documents = getDocuments(onlyIdentifiers, set, metadataPrefix, from, until);
|
108
|
ResumptionToken resumptionToken = documents.getResumptionToken();
|
109
|
int cursor = documents.getCursor();
|
110
|
int nMaxElements = documents.getnMaxElements();
|
111
|
|
112
|
if (onlyIdentifiers) {
|
113
|
res.setIdentifiers(documents.getDocs());
|
114
|
} else {
|
115
|
res.setDocuments(documents.getDocs());
|
116
|
}
|
117
|
|
118
|
if ((resumptionToken != null)) {
|
119
|
res.setResumptiontoken(resumptionToken.serialize());
|
120
|
res.setCursor(cursor);
|
121
|
res.setSize(nMaxElements);
|
122
|
}
|
123
|
return res;
|
124
|
}
|
125
|
|
126
|
/**
|
127
|
* List records.
|
128
|
*
|
129
|
* @param onlyIdentifiers
|
130
|
* only resource identifiers.
|
131
|
* @param resumptionToken
|
132
|
* resumption token
|
133
|
* @return ListRecordsInfo
|
134
|
* @throws OaiPublisherException
|
135
|
* could happen
|
136
|
*/
|
137
|
public ListRecordsInfo listRecords(final boolean onlyIdentifiers, final String resumptionToken) throws OaiPublisherException {
|
138
|
ListDocumentsInfo docs = getDocuments(onlyIdentifiers, resumptionToken);
|
139
|
|
140
|
final ListRecordsInfo res = new ListRecordsInfo();
|
141
|
|
142
|
if (docs.getMetadataPrefix() != null) {
|
143
|
res.setMetadataprefix(docs.getMetadataPrefix());
|
144
|
}
|
145
|
|
146
|
if (onlyIdentifiers) {
|
147
|
res.setIdentifiers(docs.getDocs());
|
148
|
} else {
|
149
|
res.setDocuments(docs.getDocs());
|
150
|
}
|
151
|
|
152
|
ResumptionToken newResumptionToken = docs.getResumptionToken();
|
153
|
if ((newResumptionToken != null)) {
|
154
|
res.setResumptiontoken(newResumptionToken.serialize());
|
155
|
res.setCursor(docs.getCursor());
|
156
|
res.setSize(docs.getnMaxElements());
|
157
|
res.setWithSize(!newResumptionToken.hasDateRange());
|
158
|
}
|
159
|
return res;
|
160
|
}
|
161
|
|
162
|
public List<? extends SetInfo> listSets() {
|
163
|
return this.setCollection.getAllSets(true, getCurrentDBName());
|
164
|
}
|
165
|
|
166
|
public List<MDFInfo> listMetadataFormats() {
|
167
|
return this.oaiConfigurationExistReader.getMetadataFormatInfo(true);
|
168
|
}
|
169
|
|
170
|
public boolean existSet(final String setSpec) {
|
171
|
return this.setCollection.containEnabledSet(setSpec, getCurrentDBName());
|
172
|
}
|
173
|
|
174
|
protected MDFInfo obtainMDFInfo(final String metadataPrefix) throws OaiPublisherException {
|
175
|
MDFInfo mdf = this.mdFormatsCache.get(metadataPrefix);
|
176
|
if (mdf == null) {
|
177
|
log.fatal("Not using cache for " + metadataPrefix);
|
178
|
mdf = oaiConfigurationExistReader.getMetadataFormatInfo(metadataPrefix);
|
179
|
if (mdf == null) throw new CannotDisseminateFormatException("Invalid metadataPrefix " + metadataPrefix);
|
180
|
this.mdFormatsCache.put(metadataPrefix, mdf);
|
181
|
}
|
182
|
return mdf;
|
183
|
}
|
184
|
|
185
|
/**
|
186
|
* Set the current DB from the configuration on the IS.
|
187
|
*/
|
188
|
public void setCurrentDBFromIS() throws OaiPublisherException {
|
189
|
try {
|
190
|
currentDBName = getLookupClient().getCurrentDB();
|
191
|
} catch (Exception e) {
|
192
|
throw new OaiPublisherException(e);
|
193
|
}
|
194
|
}
|
195
|
|
196
|
protected abstract RecordInfo getRecordById(final MDFInfo mdf, final String id) throws OaiPublisherException;
|
197
|
|
198
|
protected abstract ListDocumentsInfo getDocuments(final boolean onlyIdentifiers,
|
199
|
final String set,
|
200
|
final String metadataPrefix,
|
201
|
final String from,
|
202
|
final String until) throws OaiPublisherException;
|
203
|
|
204
|
protected abstract ListDocumentsInfo getDocuments(final boolean onlyIdentifiers, final String resumptionToken) throws OaiPublisherException;
|
205
|
|
206
|
public String getCurrentDBName() {
|
207
|
return currentDBName;
|
208
|
}
|
209
|
|
210
|
public void setCurrentDBName(final String currentDBName) {
|
211
|
this.currentDBName = currentDBName;
|
212
|
}
|
213
|
|
214
|
public SetCollection getSetCollection() {
|
215
|
return setCollection;
|
216
|
}
|
217
|
|
218
|
public void setSetCollection(final SetCollection setCollection) {
|
219
|
this.setCollection = setCollection;
|
220
|
}
|
221
|
|
222
|
public OAIConfigurationExistReader getOaiConfigurationExistReader() {
|
223
|
return oaiConfigurationExistReader;
|
224
|
}
|
225
|
|
226
|
public void setOaiConfigurationExistReader(final OAIConfigurationExistReader oaiConfigurationExistReader) {
|
227
|
this.oaiConfigurationExistReader = oaiConfigurationExistReader;
|
228
|
}
|
229
|
|
230
|
public ISLookUpClient getLookupClient() {
|
231
|
return lookupClient;
|
232
|
}
|
233
|
|
234
|
public void setLookupClient(final ISLookUpClient lookupClient) {
|
235
|
this.lookupClient = lookupClient;
|
236
|
}
|
237
|
|
238
|
public EhCache<String, MDFInfo> getMdFormatsCache() {
|
239
|
return mdFormatsCache;
|
240
|
}
|
241
|
|
242
|
public void setMdFormatsCache(final EhCache<String, MDFInfo> mdFormatsCache) {
|
243
|
this.mdFormatsCache = mdFormatsCache;
|
244
|
}
|
245
|
}
|