Java tutorial
/* * Copyright 2014 EUBrazilCC (EU?Brazil Cloud Connect) * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by * the European Commission - subsequent versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * * http://ec.europa.eu/idabc/eupl * * Unless required by applicable law or agreed to in writing, software * distributed under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and * limitations under the Licence. * * This product combines work with different licenses. See the "NOTICE" text * file for details on the various modules and licenses. * The "NOTICE" text file is part of the distribution. Any derivative works * that you distribute must include a readable copy of the "NOTICE" text file. */ package eu.eubrazilcc.lvl.storage.oauth2.dao; import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.collect.Lists.transform; import static eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.MONGODB_CONN; import static eu.eubrazilcc.lvl.storage.mongodb.MongoDBHelper.toProjection; import static eu.eubrazilcc.lvl.storage.mongodb.jackson.MongoDBJsonMapper.JSON_MAPPER; import static eu.eubrazilcc.lvl.storage.transform.SameTransientStore.startStore; import static java.lang.System.currentTimeMillis; import static org.apache.commons.lang.StringUtils.isNotBlank; import static org.slf4j.LoggerFactory.getLogger; import java.io.IOException; import java.io.OutputStream; import java.util.List; import java.util.concurrent.atomic.AtomicReference; import javax.annotation.Nullable; import org.apache.commons.lang.mutable.MutableLong; import org.bson.types.ObjectId; import org.slf4j.Logger; import com.fasterxml.jackson.annotation.JsonProperty; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.annotation.JsonDeserialize; import com.fasterxml.jackson.databind.annotation.JsonSerialize; import com.google.common.base.Function; import com.google.common.collect.ImmutableMap; import com.mongodb.BasicDBObject; import com.mongodb.DBObject; import com.mongodb.util.JSON; import eu.eubrazilcc.lvl.core.Sorting; import eu.eubrazilcc.lvl.core.geojson.Point; import eu.eubrazilcc.lvl.core.geojson.Polygon; import eu.eubrazilcc.lvl.storage.dao.BaseDAO; import eu.eubrazilcc.lvl.storage.dao.WriteResult; import eu.eubrazilcc.lvl.storage.mongodb.jackson.ObjectIdDeserializer; import eu.eubrazilcc.lvl.storage.mongodb.jackson.ObjectIdSerializer; import eu.eubrazilcc.lvl.storage.oauth2.AccessToken; import eu.eubrazilcc.lvl.storage.transform.SameTransientStore; /** * Access token DAO. * @author Erik Torres <ertorser@upv.es> */ public enum TokenDAO implements BaseDAO<String, AccessToken> { TOKEN_DAO; private final static Logger LOGGER = getLogger(TokenDAO.class); public static final String COLLECTION = "access_tokens"; public static final String DB_PREFIX = "accessToken."; public static final String PRIMARY_KEY = DB_PREFIX + "token"; public static final String OWNER_KEY = DB_PREFIX + "ownerId"; private TokenDAO() { MONGODB_CONN.createIndex(PRIMARY_KEY, COLLECTION); MONGODB_CONN.createNonUniqueIndex(OWNER_KEY, COLLECTION, false); } @Override public WriteResult<AccessToken> insert(final AccessToken accessToken) { // remove transient fields from the element before saving it to the database final SameTransientStore<AccessToken> store = startStore(accessToken); final DBObject obj = map(store); final String id = MONGODB_CONN.insert(obj, COLLECTION); // restore transient fields store.restore(); return new WriteResult.Builder<AccessToken>().id(id).build(); } @Override public WriteResult<AccessToken> insert(final AccessToken accessToken, final boolean ignoreDuplicates) { throw new UnsupportedOperationException( "Inserting ignoring duplicates is not currently supported in this class"); } @Override public AccessToken update(final AccessToken accessToken) { // remove transient fields from the element before saving it to the database final SameTransientStore<AccessToken> store = startStore(accessToken); final DBObject obj = map(store); MONGODB_CONN.update(obj, key(accessToken.getToken()), COLLECTION); // restore transient fields store.restore(); return null; } @Override public void delete(final String token) { MONGODB_CONN.remove(key(token), COLLECTION); } @Override public List<AccessToken> findAll() { return list(0, Integer.MAX_VALUE, null, null, null, null); } @Override public AccessToken find(final String token) { final BasicDBObject obj = MONGODB_CONN.get(key(token), COLLECTION); return parseBasicDBObjectOrNull(obj); } @Override public List<AccessToken> list(final int start, final int size, final @Nullable ImmutableMap<String, String> filter, final @Nullable Sorting sorting, final @Nullable ImmutableMap<String, Boolean> projection, final @Nullable MutableLong count) { // execute the query in the database (unsupported filter) return transform( MONGODB_CONN.list(sortCriteria(), COLLECTION, start, size, null, toProjection(projection), count), new Function<BasicDBObject, AccessToken>() { @Override public AccessToken apply(final BasicDBObject obj) { return parseBasicDBObject(obj); } }); } @Override public long count() { return MONGODB_CONN.count(COLLECTION); } @Override public List<AccessToken> getNear(final Point point, final double maxDistance) { throw new UnsupportedOperationException("Geospatial searches are not currently supported in this class"); } @Override public List<AccessToken> geoWithin(final Polygon polygon) { throw new UnsupportedOperationException("Geospatial searches are not currently supported in this class"); } @Override public void stats(final OutputStream os) throws IOException { MONGODB_CONN.stats(os, COLLECTION); } private BasicDBObject key(final String key) { return new BasicDBObject(PRIMARY_KEY, key); } private BasicDBObject ownerKey(final String key) { return new BasicDBObject(OWNER_KEY, key); } private BasicDBObject sortCriteria() { return new BasicDBObject(PRIMARY_KEY, 1); } private AccessToken parseBasicDBObject(final BasicDBObject obj) { return map(obj).getAccessToken(); } private AccessToken parseBasicDBObjectOrNull(final BasicDBObject obj) { AccessToken token = null; if (obj != null) { final AccessTokenEntity entity = map(obj); if (entity != null) { token = entity.getAccessToken(); } } return token; } private DBObject map(final SameTransientStore<AccessToken> store) { DBObject obj = null; try { obj = (DBObject) JSON.parse(JSON_MAPPER.writeValueAsString(new AccessTokenEntity(store.purge()))); } catch (JsonProcessingException e) { LOGGER.error("Failed to write access token to DB object", e); } return obj; } private AccessTokenEntity map(final BasicDBObject obj) { AccessTokenEntity entity = null; try { entity = JSON_MAPPER.readValue(obj.toString(), AccessTokenEntity.class); } catch (IOException e) { LOGGER.error("Failed to read access token from DB object", e); } return entity; } public List<AccessToken> listByOwnerId(final String ownerId) { return transform( MONGODB_CONN.list(sortCriteria(), COLLECTION, 0, Integer.MAX_VALUE, ownerKey(ownerId), null, null), new Function<BasicDBObject, AccessToken>() { @Override public AccessToken apply(final BasicDBObject obj) { return parseBasicDBObject(obj); } }); } /** * Checks whether or not the specified secret (token) was previously stored and is currently valid (not expired). * @param token - the secret associated to the token * @param ownerIdRef - if set and the resource owner is valid, then the Id of the resource owner is returned * to the caller * @return {@code true} only if the provided secret (token) is found in the storage and is currently valid (not expired). * Otherwise, returns {@code false}. */ public boolean isValid(final String token, final @Nullable AtomicReference<String> ownerIdRef) { checkArgument(isNotBlank(token), "Uninitialized or invalid token"); final AccessToken accessToken = find(token); final boolean isValid = isValid(token); if (isValid(token) && ownerIdRef != null) { ownerIdRef.set(accessToken.getOwnerId()); } return isValid; } /** * Checks whether or not the specified secret (token) was previously stored and is currently valid (not expired). * @param token - the secret associated to the token * @return {@code true} only if the provided secret (token) is found in the * storage and is currently valid (not expired). Otherwise, returns * {@code false}. */ public boolean isValid(final String token) { checkArgument(isNotBlank(token), "Uninitialized or invalid token"); final AccessToken accessToken = find(token); return (accessToken != null && accessToken.getToken() != null && token.equals(accessToken.getToken()) && (accessToken.getIssuedAt() + accessToken.getExpiresIn()) > (currentTimeMillis() / 1000l)); } /** * Token entity. * @author Erik Torres <ertorser@upv.es> */ public static class AccessTokenEntity { @JsonSerialize(using = ObjectIdSerializer.class) @JsonDeserialize(using = ObjectIdDeserializer.class) @JsonProperty("_id") private ObjectId id; private AccessToken accessToken; public AccessTokenEntity() { } public AccessTokenEntity(final AccessToken accessToken) { setAccessToken(accessToken); } public ObjectId getId() { return id; } public void setId(final ObjectId id) { this.id = id; } public AccessToken getAccessToken() { return accessToken; } public void setAccessToken(final AccessToken accessToken) { this.accessToken = accessToken; } } }