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.Date; 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.linkedin.LinkedInState; import eu.eubrazilcc.lvl.storage.transform.SameTransientStore; /** * {@link LinkedInState} DAO. * @author Erik Torres <ertorser@upv.es> */ public enum LinkedInStateDAO implements BaseDAO<String, LinkedInState> { LINKEDIN_STATE_DAO; private final static Logger LOGGER = getLogger(LinkedInStateDAO.class); public static final String COLLECTION = "linkedin_state"; public static final String DB_PREFIX = "linkedInState."; public static final String PRIMARY_KEY = DB_PREFIX + "state"; public static final String ISSUED_AT_KEY = DB_PREFIX + "issuedAt"; private LinkedInStateDAO() { MONGODB_CONN.createIndex(PRIMARY_KEY, COLLECTION); MONGODB_CONN.createNonUniqueIndex(ISSUED_AT_KEY, COLLECTION, false); } @Override public WriteResult<LinkedInState> insert(final LinkedInState state) { // remove transient fields from the element before saving it to the database final SameTransientStore<LinkedInState> store = startStore(state); final DBObject obj = map(store); final String id = MONGODB_CONN.insert(obj, COLLECTION); // restore transient fields store.restore(); return new WriteResult.Builder<LinkedInState>().id(id).build(); } @Override public WriteResult<LinkedInState> insert(final LinkedInState state, final boolean ignoreDuplicates) { throw new UnsupportedOperationException( "Inserting ignoring duplicates is not currently supported in this class"); } @Override public LinkedInState update(final LinkedInState state) { // remove transient fields from the element before saving it to the database final SameTransientStore<LinkedInState> store = startStore(state); final DBObject obj = map(store); MONGODB_CONN.update(obj, key(state.getState()), COLLECTION); // restore transient fields store.restore(); return null; } @Override public void delete(final String state) { MONGODB_CONN.remove(key(state), COLLECTION); } @Override public List<LinkedInState> findAll() { return list(0, Integer.MAX_VALUE, null, null, null, null); } @Override public LinkedInState find(final String state) { final BasicDBObject obj = MONGODB_CONN.get(key(state), COLLECTION); return parseBasicDBObjectOrNull(obj); } @Override public List<LinkedInState> 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, LinkedInState>() { @Override public LinkedInState apply(final BasicDBObject obj) { return parseBasicDBObject(obj); } }); } @Override public long count() { return MONGODB_CONN.count(COLLECTION); } @Override public List<LinkedInState> getNear(final Point point, final double maxDistance) { throw new UnsupportedOperationException("Geospatial searches are not currently supported in this class"); } @Override public List<LinkedInState> 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 issuedAtKey(final Date key) { return new BasicDBObject(ISSUED_AT_KEY, key.getTime()); } private BasicDBObject sortCriteria() { return new BasicDBObject(PRIMARY_KEY, 1); } private LinkedInState parseBasicDBObject(final BasicDBObject obj) { return map(obj).getLinkedInState(); } private LinkedInState parseBasicDBObjectOrNull(final BasicDBObject obj) { LinkedInState state = null; if (obj != null) { final LinkedInStateEntity entity = map(obj); if (entity != null) { state = entity.getLinkedInState(); } } return state; } private DBObject map(final SameTransientStore<LinkedInState> store) { DBObject obj = null; try { obj = (DBObject) JSON.parse(JSON_MAPPER.writeValueAsString(new LinkedInStateEntity(store.purge()))); } catch (JsonProcessingException e) { LOGGER.error("Failed to write access state to DB object", e); } return obj; } private LinkedInStateEntity map(final BasicDBObject obj) { LinkedInStateEntity entity = null; try { entity = JSON_MAPPER.readValue(obj.toString(), LinkedInStateEntity.class); } catch (IOException e) { LOGGER.error("Failed to read access state from DB object", e); } return entity; } public List<LinkedInState> listByIssuedDate(final Date date) { return transform( MONGODB_CONN.list(sortCriteria(), COLLECTION, 0, Integer.MAX_VALUE, issuedAtKey(date), null, null), new Function<BasicDBObject, LinkedInState>() { @Override public LinkedInState apply(final BasicDBObject obj) { return parseBasicDBObject(obj); } }); } /** * Checks whether or not the specified secret (state) was previously stored and is currently valid (not expired). * @param secret - the secret associated to the state * @param redirectUriRef - if set and the state is valid, then the redirect URI is returned to the caller * @param callbackRef - if set and the state is valid, then the callback URI is returned to the caller * @return {@code true} only if the provided secret (state) is found in the storage and is currently valid (not expired). * Otherwise, returns {@code false}. */ public boolean isValid(final String secret, final @Nullable AtomicReference<String> redirectUriRef, final @Nullable AtomicReference<String> callbackRef) { checkArgument(isNotBlank(secret), "Uninitialized or invalid state"); final LinkedInState state = find(secret); final boolean isValid = (state != null && state.getState() != null && secret.equals(state.getState()) && (state.getIssuedAt() + state.getExpiresIn()) > (currentTimeMillis() / 1000l)); if (isValid) { if (redirectUriRef != null) { redirectUriRef.set(state.getRedirectUri()); } if (callbackRef != null) { callbackRef.set(state.getCallback()); } } return isValid; } /** * Token entity. * @author Erik Torres <ertorser@upv.es> */ public static class LinkedInStateEntity { @JsonSerialize(using = ObjectIdSerializer.class) @JsonDeserialize(using = ObjectIdDeserializer.class) @JsonProperty("_id") private ObjectId id; private LinkedInState state; public LinkedInStateEntity() { } public LinkedInStateEntity(final LinkedInState state) { setLinkedInState(state); } public ObjectId getId() { return id; } public void setId(final ObjectId id) { this.id = id; } public LinkedInState getLinkedInState() { return state; } public void setLinkedInState(final LinkedInState state) { this.state = state; } } }