1
|
package eu.dnetlib.dli.resolver;
|
2
|
|
3
|
import com.google.gson.Gson;
|
4
|
import com.google.gson.GsonBuilder;
|
5
|
import com.mongodb.DBObject;
|
6
|
import com.mongodb.MongoClient;
|
7
|
import com.mongodb.QueryBuilder;
|
8
|
import com.mongodb.client.FindIterable;
|
9
|
import com.mongodb.client.MongoCollection;
|
10
|
import com.mongodb.client.MongoCursor;
|
11
|
import com.mongodb.client.MongoDatabase;
|
12
|
import eu.dnetlib.dli.resolver.model.DLIResolvedObject;
|
13
|
import eu.dnetlib.dli.resolver.model.DLIResolvedObjectDeserializer;
|
14
|
import eu.dnetlib.pid.resolver.AbstractPIDResolver;
|
15
|
|
16
|
import org.apache.commons.logging.Log;
|
17
|
import org.apache.commons.logging.LogFactory;
|
18
|
import org.bson.Document;
|
19
|
import org.bson.conversions.Bson;
|
20
|
import org.springframework.beans.factory.annotation.Autowired;
|
21
|
|
22
|
public class DLIOfflineResolver extends AbstractPIDResolver {
|
23
|
|
24
|
/**
|
25
|
* The Constant log.
|
26
|
*/
|
27
|
private static final Log log = LogFactory.getLog(DLIOfflineResolver.class);
|
28
|
|
29
|
@Autowired
|
30
|
private MongoClient mongoClient;
|
31
|
|
32
|
private MongoDatabase db;
|
33
|
|
34
|
private Gson g = new GsonBuilder().registerTypeAdapter(DLIResolvedObject.class, new DLIResolvedObjectDeserializer()).create();
|
35
|
|
36
|
@Override
|
37
|
protected boolean canResolvePid(final String pidType) {
|
38
|
// return isAvailableOffline();
|
39
|
return true;
|
40
|
}
|
41
|
|
42
|
@Override
|
43
|
protected DLIResolvedObject resolve(final String pid, final String pidType) {
|
44
|
|
45
|
final String dliItem = retrieveDLIFromDump(pid.toLowerCase().trim(),pidType.toLowerCase().trim());
|
46
|
if (dliItem!= null)
|
47
|
return g.fromJson(dliItem, DLIResolvedObject.class);
|
48
|
return null;
|
49
|
|
50
|
}
|
51
|
|
52
|
|
53
|
private String retrieveDLIFromDump(final String pid, final String pidType) {
|
54
|
log.debug(String.format("trying to find %s of type %s", pid, pidType));
|
55
|
if (db == null) {
|
56
|
db = mongoClient.getDatabase("dli_resolved");
|
57
|
}
|
58
|
final MongoCollection<Document> crossRef = db.getCollection("dli");
|
59
|
DBObject query = QueryBuilder.start("pid").is(pid).and("pid_type").is(pidType).get();
|
60
|
FindIterable<Document> documents = crossRef.find((Bson) query).limit(1);
|
61
|
MongoCursor<Document> iterator = documents.iterator();
|
62
|
if (iterator.hasNext()){
|
63
|
log.debug("found pid "+pid);
|
64
|
return iterator.next().get("body").toString();
|
65
|
}
|
66
|
return null;
|
67
|
}
|
68
|
|
69
|
|
70
|
}
|