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RESTHeart MongoDB - MongoDB plugin
/*-
* ========================LICENSE_START=================================
* restheart-mongodb
* %%
* Copyright (C) 2014 - 2024 SoftInstigate
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see }
*/
public class Databases {
/**
*
*/
public static final Bson PROPS_QUERY = eq("_id", DB_META_DOCID);
private static final Document FIELDS_TO_RETURN;
static {
FIELDS_TO_RETURN = new Document();
FIELDS_TO_RETURN.put("_id", 1);
FIELDS_TO_RETURN.put("_etag", 1);
}
private final MongoClient client = RHMongoClients.mclient();
/**
* delegated object for collection operations
*/
private final Collections collections;
/**
* delegated object for indexes operations
*/
private final Indexes indexes;
private Databases() {
this.collections = Collections.get();
this.indexes = Indexes.get();
}
private static final Databases INSTANCE = new Databases();
public static Databases get() {
return INSTANCE;
}
/**
*
* @param rsOps the ReplicaSet connection options
* @param dbName the name of the db
* @return the MongoDatabase
*/
MongoDatabase db(Optional rsOps, String dbName) {
return rsOps.isPresent() ? rsOps.get().apply(client.getDatabase(dbName)) : client.getDatabase(dbName);
}
/**
* Returns true if the collection exists
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the name of the db
*
* @return true if the db exists
*/
public boolean doesDbExist(final Optional cs, Optional rsOps, String dbName) {
var db = db(rsOps, dbName);
// at least one collection exists for an existing db
return cs.isPresent()
? db.listCollectionNames(cs.get()).first() != null
: db.listCollectionNames().first() != null;
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @return A ordered List of collection names
*/
public List getCollectionNames(final Optional cs, Optional rsOps, final String dbName) {
var db = db(rsOps, dbName);
var _colls = new ArrayList();
if (cs.isPresent()) {
db.listCollectionNames(cs.get()).into(_colls);
} else {
db.listCollectionNames().into(_colls);
}
// filter out reserved collections
return _colls.stream()
.filter(coll -> !MongoRequest.isReservedCollectionName(coll))
.sorted()
.collect(Collectors.toList());
}
/**
* @param colls the collections list got from getCollectionNames()
* @return the number of collections in this db
*
*/
public long getDBSize(final List colls) {
// filter out reserved resources
var _colls = colls.stream()
.filter(coll -> !MongoRequest
.isReservedCollectionName(coll))
.collect(Collectors.toList());
return _colls.size();
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @return the db props
*
*/
public BsonDocument getDatabaseProperties(final Optional cs, Optional rsOps, final String dbName) {
var propsColl = collections.collection(rsOps, dbName, META_COLLNAME);
var props = cs.isPresent()
? propsColl.find(cs.get(), PROPS_QUERY).limit(1).first()
: propsColl.find(PROPS_QUERY).limit(1).first();
if (props != null) {
props.append("_id", new BsonString(dbName));
} else if (doesDbExist(cs, rsOps, dbName)) {
return new BsonDocument("_id", new BsonString(dbName));
}
return props;
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param colls the collections list as got from getCollectionNames()
* @param page
* @param pagesize
* @param noCache
* @return the db data
* @throws org.restheart.exchange.IllegalQueryParamenterException
*
*/
public BsonArray getDatabaseData(
final Optional cs,
Optional rsOps,
final String dbName,
final List colls,
final int page,
final int pagesize,
boolean noCache) throws IllegalQueryParamenterException {
// filter out reserved resources
var _colls = colls.stream()
.filter(coll -> !MongoRequest.isReservedCollectionName(coll))
.collect(Collectors.toList());
int size = _colls.size();
// *** arguments check
long total_pages;
if (size > 0) {
float _size = size + 0f;
float _pagesize = pagesize + 0f;
total_pages = Math.max(1, Math.round(Math.ceil(_size / _pagesize)));
if (page > total_pages) {
return new BsonArray();
}
}
// apply page and pagesize
_colls = _colls.subList((page - 1) * pagesize, (page - 1) * pagesize + pagesize > _colls.size() ? _colls.size() : (page - 1) * pagesize + pagesize);
var data = new BsonArray();
_colls.stream().map((collName) -> {
var properties= new BsonDocument("_id", new BsonString(collName));
BsonDocument collProperties;
if (MetadataCachesSingleton.isEnabled() && !noCache) {
collProperties = MetadataCachesSingleton.getInstance().getCollectionProperties(dbName, collName);
} else {
collProperties = collections.getCollectionProps(cs, rsOps, dbName, collName);
}
if (collProperties != null) {
properties.putAll(collProperties);
}
return properties;
}
).forEach((item) -> {
data.add(item);
});
return data;
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param method
* @param updating
* @param newContent
* @param requestEtag
* @param checkEtag
* @return the OperationResult
*/
public OperationResult upsertDB(
final Optional cs,
final Optional rsOps,
final String dbName,
final METHOD method,
final boolean updating,
final BsonDocument newContent,
final String requestEtag,
final boolean checkEtag) {
var newEtag = new ObjectId();
final BsonDocument content = DbUtils.validContent(newContent);
content.put("_etag", new BsonObjectId(newEtag));
content.remove("_id"); // make sure we don't change this field
var mcoll = collections.collection(rsOps, dbName, META_COLLNAME);
if (checkEtag && updating) {
var oldProperties = cs.isPresent()
? mcoll.find(cs.get(), eq("_id", DB_META_DOCID)).projection(FIELDS_TO_RETURN).first()
: mcoll.find(eq("_id", DB_META_DOCID)).projection(FIELDS_TO_RETURN).first();
if (oldProperties != null) {
var oldEtag = oldProperties.get("_etag");
if (oldEtag != null && requestEtag == null) {
return new OperationResult(HttpStatus.SC_CONFLICT, oldEtag);
}
BsonValue _requestEtag;
if (ObjectId.isValid(requestEtag)) {
_requestEtag = new BsonObjectId(new ObjectId(requestEtag));
} else {
// restheart generates ObjectId etags, but here we support
// strings as well
_requestEtag = new BsonString(requestEtag);
}
if (Objects.equals(_requestEtag, oldEtag)) {
return doDbPropsUpdate(
cs,
rsOps,
method,
updating,
mcoll,
content,
newEtag);
} else {
return new OperationResult(HttpStatus.SC_PRECONDITION_FAILED, oldEtag);
}
} else {
// this is the case when the db does not have properties
// e.g. it has not been created by restheart
return doDbPropsUpdate(
cs,
rsOps,
method,
updating,
mcoll,
content,
newEtag);
}
} else {
return doDbPropsUpdate(
cs,
rsOps,
method,
updating,
mcoll,
content,
newEtag);
}
}
private OperationResult doDbPropsUpdate(
final Optional cs,
final Optional rsOps,
final METHOD method,
final boolean updating,
final MongoCollection mcoll,
final BsonDocument dcontent,
final ObjectId newEtag) {
var ret = DbUtils.writeDocument(
cs,
method,
WRITE_MODE.UPSERT,
mcoll,
Optional.of(new BsonString(DB_META_DOCID)),
Optional.empty(),
Optional.empty(),
dcontent);
return new OperationResult(ret.getHttpCode() > 0 ? ret.getHttpCode() : updating ? HttpStatus.SC_OK : HttpStatus.SC_CREATED, newEtag);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param requestEtag
* @param checkEtag
* @return the OperationResult
*/
public OperationResult deleteDatabase(
final Optional cs,
final Optional rsOps,
final String dbName,
final BsonObjectId requestEtag,
final boolean checkEtag) {
var db = db(rsOps, dbName);
var mcoll = collections.collection(rsOps, dbName, META_COLLNAME);
if (checkEtag) {
var query = eq("_id", DB_META_DOCID);
var properties = cs.isPresent()
? mcoll.find(cs.get(), query).projection(FIELDS_TO_RETURN).first()
: mcoll.find(query).projection(FIELDS_TO_RETURN).first();
if (properties != null) {
var oldEtag = properties.get("_etag");
if (oldEtag != null) {
if (requestEtag == null) {
return new OperationResult(HttpStatus.SC_CONFLICT, oldEtag);
} else if (!requestEtag.equals(oldEtag)) {
return new OperationResult(HttpStatus.SC_PRECONDITION_FAILED, oldEtag);
}
}
}
}
if (cs.isPresent()) {
db.drop(cs.get());
} else {
db.drop();
}
return new OperationResult(HttpStatus.SC_NO_CONTENT);
}
/**
*
* @param cs the client session
* @return and ordered list of the databases
*/
public List getDatabaseNames(final Optional cs) {
var dbNames = new ArrayList();
if (cs.isPresent()) {
client.listDatabaseNames(cs.get()).into(dbNames);
} else {
client.listDatabaseNames().into(dbNames);
}
return dbNames;
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName
* @return the collection properties
*/
public BsonDocument getCollectionProperties(final Optional cs, final Optional rsOps, final String dbName, final String collName) {
return collections.getCollectionProps(cs, rsOps, dbName, collName);
}
/**
*
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName
* @return the MongoCollection
*/
public MongoCollection collection(Optional rsOps, String dbName, final String collName) {
return collections.collection(rsOps, dbName, collName);
}
/**
* Returns the number of documents in the given collection (taking into
* account the filters in case).
*
* @param cs the ClientSession
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName the collection name
* @param filter the filters to apply. it is a Deque collection of mongodb
* query conditions.
* @return the number of documents in the given collection (taking into
* account the filters in case)
*/
public long getCollectionSize(final Optional cs, Optional rsOps, String dbName, final String collName, BsonDocument filter) {
return collections.getCollectionSize(cs, rsOps, dbName, collName, filter);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName the collection name
* @param page
* @param pagesize
* @param sortBy
* @param filters
* @param hint
* @param keys
* @param useCache
* @return the documents in the collection as a BsonArray
*/
public BsonArray getCollectionData(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collName,
final int page,
final int pagesize,
final BsonDocument sortBy,
final BsonDocument filters,
final BsonDocument hint,
final BsonDocument keys,
final boolean useCache)
throws JsonParseException {
return collections.getCollectionData(cs, rsOps, dbName, collName, page, pagesize, sortBy, filters, hint, keys, useCache);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName the collection name
* @param requestEtag
* @param checkEtag
* @return the OperationResult
*/
public OperationResult deleteCollection(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collName,
final BsonObjectId requestEtag,
final boolean checkEtag) {
return collections.deleteCollection(
cs,
rsOps,
dbName,
collName,
requestEtag,
checkEtag);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param method the request method
* @param updating true if updating, false if creating
* @param collName
* @param content
* @param requestEtag
* @param checkEtag
* @return the OperationResult
*/
public OperationResult upsertCollection(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collName,
final METHOD method,
final boolean updating,
final BsonDocument content,
final String requestEtag,
final boolean checkEtag) {
return collections.upsertCollection(
cs,
rsOps,
dbName,
collName,
method,
updating,
content,
requestEtag,
checkEtag);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collection
* @param indexId
* @return the HTTP status code
*/
public int deleteIndex(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collection,
final String indexId) {
return indexes.deleteIndex(cs, rsOps, dbName, collection, indexId);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collectionName
* @return an ordered list of the indexes
*/
public List getCollectionIndexes(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collectionName) {
return indexes.getCollectionIndexes(cs, rsOps, dbName, collectionName);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName the collection name
* @param sortBy
* @param filters
* @param hint
* @param keys
* @param batchSize
* @return the FindIterable
*/
public FindIterable findIterable(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collName,
final BsonDocument sortBy,
final BsonDocument filters,
final BsonDocument hint,
final BsonDocument keys,
final int batchSize) {
return collections.findIterable(
cs,
collections.collection(rsOps, dbName, collName),
sortBy,
filters,
hint,
keys,
batchSize);
}
/**
*
* @param cs the client session
* @param rsOps the ReplicaSet connection options
* @param dbName the database name
* @param collName the collection name
* @param keys
* @param options
*/
public void createIndex(
final Optional cs,
final Optional rsOps,
final String dbName,
final String collName,
final BsonDocument keys,
final Optional options) {
indexes.createIndex(cs, rsOps, dbName, collName, keys, options);
}
}
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