org.elastos.hive.service

Interface DatabaseService

public interface DatabaseService

Mongo database service.

TODO: refine APIs like *One, *Many, find*.

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.CompletableFuture<java.lang.Long>	countDocuments(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode query, CountOptions options) Count documents.
java.util.concurrent.CompletableFuture<java.lang.Void>	createCollection(java.lang.String name) Lets the vault owner create a collection on database.
java.util.concurrent.CompletableFuture<java.lang.Void>	deleteCollection(java.lang.String name) Lets the vault owner delete a collection on database according to collection name.
java.util.concurrent.CompletableFuture<java.lang.Void>	deleteMany(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode filter) Delete many existing documents in a given collection.
java.util.concurrent.CompletableFuture<java.lang.Void>	deleteOne(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode filter) Delete an existing document in a given collection.
java.util.concurrent.CompletableFuture<java.util.List<com.fasterxml.jackson.databind.JsonNode>>	findMany(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode query, FindOptions options) Find many documents.
java.util.concurrent.CompletableFuture<com.fasterxml.jackson.databind.JsonNode>	findOne(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode query, FindOptions options) Find a specific document.
java.util.concurrent.CompletableFuture<InsertResult>	insertMany(java.lang.String collection, java.util.List<com.fasterxml.jackson.databind.JsonNode> docs, InsertOptions options) Insert many new documents in a given collection.
java.util.concurrent.CompletableFuture<InsertResult>	insertOne(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode doc, InsertOptions options) Insert a new document in a given collection.
java.util.concurrent.CompletableFuture<java.util.List<com.fasterxml.jackson.databind.JsonNode>>	query(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode query, QueryOptions options) Find many documents by many options.
java.util.concurrent.CompletableFuture<UpdateResult>	updateMany(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode filter, com.fasterxml.jackson.databind.JsonNode update, UpdateOptions options) Update many existing documents in a given collection.
java.util.concurrent.CompletableFuture<UpdateResult>	updateOne(java.lang.String collection, com.fasterxml.jackson.databind.JsonNode filter, com.fasterxml.jackson.databind.JsonNode update, UpdateOptions options) Update an existing document in a given collection.

Method Detail

createCollection

java.util.concurrent.CompletableFuture<java.lang.Void> createCollection(java.lang.String name)

Lets the vault owner create a collection on database.

Parameters:

name - the collection name

Returns:

fail(false) or success(true)

deleteCollection

java.util.concurrent.CompletableFuture<java.lang.Void> deleteCollection(java.lang.String name)

Lets the vault owner delete a collection on database according to collection name.

Parameters:

name - the collection name

Returns:

fail(false) or success(true)

insertOne

java.util.concurrent.CompletableFuture<InsertResult> insertOne(java.lang.String collection,
                                                               com.fasterxml.jackson.databind.JsonNode doc,
                                                               InsertOptions options)

Insert a new document in a given collection.

Parameters:

collection - the collection name

doc - The document to insert. Must be a mutable mapping type. If the document does not have an _id field one will be added automatically

options - bypass_document_validation: (optional) If True, allows the write to opt-out of document level validation. Default is False.

Returns:

Results returned by InsertResult wrapper

insertMany

java.util.concurrent.CompletableFuture<InsertResult> insertMany(java.lang.String collection,
                                                                java.util.List<com.fasterxml.jackson.databind.JsonNode> docs,
                                                                InsertOptions options)

Insert many new documents in a given collection.

Parameters:

collection - the collection name

docs - The document to insert. Must be a mutable mapping type. If the document does not have an _id field one will be added automatically.

options - ordered (optional): If True (the default) documents will be inserted on the server serially, in the order provided. If an error occurs all remaining inserts are aborted. If False, documents will be inserted on the server in arbitrary order, possibly in parallel, and all document inserts will be attempted. bypass_document_validation: (optional) If True, allows the write to opt-out of document level validation. Default is False.

Returns:

Results returned by InsertResult wrapper

countDocuments

java.util.concurrent.CompletableFuture<java.lang.Long> countDocuments(java.lang.String collection,
                                                                      com.fasterxml.jackson.databind.JsonNode query,
                                                                      CountOptions options)

Count documents.

Parameters:

collection - the collection name

query - The document of filter

options - skip (int): The number of matching documents to skip before returning results. limit (int): The maximum number of documents to count. Must be a positive integer. If not provided, no limit is imposed. maxTimeMS (int): The maximum amount of time to allow this operation to run, in milliseconds.

Returns:

count size

findOne

java.util.concurrent.CompletableFuture<com.fasterxml.jackson.databind.JsonNode> findOne(java.lang.String collection,
                                                                                        com.fasterxml.jackson.databind.JsonNode query,
                                                                                        FindOptions options)

Find a specific document.

Parameters:

collection - the collection name

query - optional, a JSON object specifying elements which must be present for a document to be included in the result set

options - optional,refer to FindOptions

Returns:

a JSON object document result

findMany

java.util.concurrent.CompletableFuture<java.util.List<com.fasterxml.jackson.databind.JsonNode>> findMany(java.lang.String collection,
                                                                                                         com.fasterxml.jackson.databind.JsonNode query,
                                                                                                         FindOptions options)

Find many documents.

Parameters:

collection - the collection name

query - optional, a JSON object specifying elements which must be present for a document to be included in the result set

options - optional,refer to FindOptions

Returns:

a JsonNode array result of document

query

java.util.concurrent.CompletableFuture<java.util.List<com.fasterxml.jackson.databind.JsonNode>> query(java.lang.String collection,
                                                                                                      com.fasterxml.jackson.databind.JsonNode query,
                                                                                                      QueryOptions options)

Find many documents by many options.

Parameters:

collection - the collection name

query - optional, a JSON object specifying elements which must be present for a document to be included in the result set

options - optional,refer to QueryOptions

Returns:

a JsonNode array result of document

updateOne

java.util.concurrent.CompletableFuture<UpdateResult> updateOne(java.lang.String collection,
                                                               com.fasterxml.jackson.databind.JsonNode filter,
                                                               com.fasterxml.jackson.databind.JsonNode update,
                                                               UpdateOptions options)

Update an existing document in a given collection.

Parameters:

collection - the collection name

filter - A query that matches the document to update.

update - The modifications to apply.

options - optional, refer to UpdateOptions

Returns:

Results returned by UpdateResult wrapper

updateMany

java.util.concurrent.CompletableFuture<UpdateResult> updateMany(java.lang.String collection,
                                                                com.fasterxml.jackson.databind.JsonNode filter,
                                                                com.fasterxml.jackson.databind.JsonNode update,
                                                                UpdateOptions options)

Update many existing documents in a given collection.

Parameters:

collection - the collection name

filter - A query that matches the document to update.

update - The modifications to apply.

options - optional, refer to UpdateOptions

Returns:

Results returned by UpdateResult wrapper

deleteOne

java.util.concurrent.CompletableFuture<java.lang.Void> deleteOne(java.lang.String collection,
                                                                 com.fasterxml.jackson.databind.JsonNode filter)

Delete an existing document in a given collection.

Parameters:

collection - the collection name

filter - A query that matches the document to delete.

Returns:

Delete result

deleteMany

java.util.concurrent.CompletableFuture<java.lang.Void> deleteMany(java.lang.String collection,
                                                                  com.fasterxml.jackson.databind.JsonNode filter)

Delete many existing documents in a given collection.

Parameters:

collection - the collection name

filter - A query that matches the document to delete.

Returns:

Delete result