OrientDB连接池

Question

我正在使用OrientDB 2.2.5作为多线程Java Web应用程序的后端，我尝试了许多不同的连接方法。每种方法似乎都有问题。

我基本上需要能够同时调用以使用OrientDB数据库的东西，无论是静态方法还是对象实例。

我尝试了各种方法，并遇到了记录锁定或其他各种异常的问题。该文档显示了折旧的连接池方法（ODatabaseDocumentPool），互联网上的各种其他来源显示了多种方式（ODatabaseDocumentTx，OPartitionedDatabasePool）。

请有人提供可重用的方法来连接到实例（目前只是一个本地）并发出基本查询。还请包括任何连接清理逻辑（我认为这导致我锁定记录的问题，甚至在上次更新后几秒钟）。

任何帮助/指针将不胜感激。

Answer 1

使用最少1个，最多10个实例的可循环实例池：

Array
(
    [user] => Array
        (
            [0] => stdClass Object
                (
                    [id] => 5
                    [name] => 
                    [email] => test@test.com
                    [password] => test
                    [role] => 
                    [status] => 1
                )

        )

    [books] => Array
        (
            [0] => stdClass Object
                (
                    [id] => 1
                    [user_id] => 5
                    [book_id] => 1
                    [date_issue] => 2016-07-24 00:00:00
                    [date_return] => 2016-07-25 00:00:00
                )

            [1] => stdClass Object
                (
                    [id] => 2
                    [user_id] => 5
                    [book_id] => 2
                    [date_issue] => 2016-07-24 00:00:00
                    [date_return] => 2016-07-25 00:00:00
                )

            [2] => stdClass Object
                (
                    [id] => 3
                    [user_id] => 5
                    [book_id] => 1
                    [date_issue] => 2016-07-25 00:00:00
                    [date_return] => 2016-07-25 00:00:00
                )

        )

    [bookdata] => Array
        (
            [0] => Array
                (
                    [0] => stdClass Object
                        (
                            [id] => 1
                            [title] => PHP Made Easy 
                            [author] => Dietel & Dietel 
                            [serial_no] => 232323
                            [qty] => 9
                            [row_no] => 1
                            [col_no] => 2
                            [status] => 1
                            [category_id] => 1
                            [description] => This is a book about php 
                        )

                )

            [1] => Array
                (
                    [0] => stdClass Object
                        (
                            [id] => 2
                            [title] => C++
                            [author] => Dietel & Dietel 
                            [serial_no] => 232323
                            [qty] => 9
                            [row_no] => 1
                            [col_no] => 2
                            [status] => 1
                            [category_id] => 1
                            [description] => This is a book about c++
                        )

                )

            [2] => Array
                (
                    [0] => stdClass Object
                        (
                            [id] => 1
                            [title] => PHP Made Easy 
                            [author] => Dietel & Dietel 
                            [serial_no] => 232323
                            [qty] => 9
                            [row_no] => 1
                            [col_no] => 2
                            [status] => 1
                            [category_id] => 1
                            [description] => This is a book about php 
                        )

                )

        )

)

配置工厂后，您可以获得Graph实例以开始工作。 OrientGraphFactory有两种方法来检索Transactional和Non-Transactional实例：

 foreach ($data  as  $key=> $value) {
        echo $key[$value]->id;
    }

希望它有所帮助。

Answer 2

如果您使用文档API，则OPartitionedDatabasePool是您选择的池。请注意，这是OrientGraphFactory内部使用的池实现。