Я реализовал пользовательский MongoDB CodecProvider для сопоставления с моими java-объектами, используя эту Github gist .Однако я не могу десериализовать Date
значения, скорее возвращаются null
значения.Вот фрагмент моей пользовательской реализации кодера для моего pojo - AuditLog
:
public void encode(BsonWriter writer, AuditLog value, EncoderContext encoderContext) {
Document document = new Document();
DateCodec dateCodec = new DateCodec();
ObjectId id = value.getLogId();
Date timestamp = value.getTimestamp();
String deviceId = value.getDeviceId();
String userId = value.getUserId();
String requestId = value.getRequestId();
String operationType = value.getOperationType();
String message = value.getMessage();
String serviceName = value.getServiceName();
String className = value.getClassName();
if (null != id) {
document.put("_id", id);
}
if (null != timestamp) {
document.put("timestamp", timestamp);
}
if (null != deviceId) {
document.put("deviceId", deviceId);
}
if (null != userId) {
document.put("userId", userId);
}
if (null != requestId) {
document.put("requestId", requestId);
}
if (null != operationType) {
document.put("operationType", operationType);
}
if (null != message) {
document.put("message", message);
}
if (null != serviceName) {
document.put("serviceName", serviceName);
}
if (null != className) {
document.put("className", className);
}
documentCodec.encode(writer, document, encoderContext);
}
и декодера:
public AuditLog decode(BsonReader reader, DecoderContext decoderContext) {
Document document = documentCodec.decode(reader, decoderContext);
System.out.println("document " + document);
AuditLog auditLog = new AuditLog();
auditLog.setLogId(document.getObjectId("_id"));
auditLog.setTimestamp(document.getDate("timestamp"));
auditLog.setDeviceId(document.getString("deviceId"));
auditLog.setUserId(document.getString("userId"));
auditLog.setRequestId(document.getString("requestId"));
auditLog.setOperationType(document.getString("operationType"));
auditLog.setMessage(document.getString("message"));
auditLog.setServiceName(document.getString("serviceName"));
auditLog.setClassName(document.getString("className"));
return auditLog;
}
и способ чтения:
public void getAuthenticationEntries() {
Codec<Document> defaultDocumentCodec = MongoClient.getDefaultCodecRegistry().get(Document.class);
AuditLogCodec auditLogCodec = new AuditLogCodec(defaultDocumentCodec);
CodecRegistry codecRegistry = CodecRegistries.fromRegistries(MongoClient.getDefaultCodecRegistry(),
CodecRegistries.fromCodecs(auditLogCodec));
MongoClientOptions options = MongoClientOptions.builder().codecRegistry(codecRegistry).build();
MongoClient mc = new MongoClient("1.2.3.4:27017", options);
MongoCollection<AuditLog> collection = mc.getDatabase("myDB").getCollection("myCol",
AuditLog.class);
BasicDBObject neQuery = new BasicDBObject();
neQuery.put("myFiltr", new BasicDBObject("$eq", "mystuffr"));
FindIterable<AuditLog> cursor = collection.find(neQuery);
List<AuditLog> cleanList = new ArrayList<AuditLog>();
for (AuditLog object : cursor) {
System.out.println("timestamp: " + object.getTimestamp());
}
}
Мое pojo:
public class AuditLog implements Bson {
@Id
private ObjectId logId;
@JsonProperty("@timestamp")
private Date timestamp;
@JsonProperty("deviceId")
private String deviceId;
@JsonProperty("userId")
private String userId;
@JsonProperty("requestId")
private String requestId;
@JsonProperty("operationType")
private String operationType;
@JsonProperty("message")
private String message;
@JsonProperty("serviceName")
private String serviceName;
@JsonProperty("className")
private String className;