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-rw-r--r--adapters/database/VerticaDB.py55
1 files changed, 55 insertions, 0 deletions
diff --git a/adapters/database/VerticaDB.py b/adapters/database/VerticaDB.py
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+# -------------------------------------------------------------------------
+# Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# -------------------------------------------------------------------------
+#
+
+import jaydebeapi
+import sqlalchemy.pool as pool
+
+from jaydebeapi import _DEFAULT_CONVERTERS, _java_to_py
+from osdf.utils.programming_utils import MetaSingleton
+from osdf.config.base import osdf_config
+
+_DEFAULT_CONVERTERS.update({'BIGINT': _java_to_py('longValue')})
+
+
+class VerticaDB(metaclass=MetaSingleton):
+ connection_pool = None
+
+ def get_connection(self):
+ p = self.get_config_params()
+ c = jaydebeapi.connect(
+ 'com.vertica.jdbc.Driver',
+ 'jdbc:vertica://{}:{}/{}'.format(p['host'], p['port'], p['db']),
+ {'user': p['user'], 'password': p['passwd'], 'CHARSET': 'UTF8'},
+ jars=[p['db_driver']]
+ )
+ return c
+
+ def get_config_params(self):
+ config = osdf_config["deployment"]
+ host, port, db = config["verticaHost"], config["verticaPort"], config.get("verticaDB")
+ user, passwd = config["verticaUsername"], config["verticaPassword"]
+ jar_path = osdf_config['core']['osdf_system']['vertica_jar']
+ params = dict(host=host, db=db, user=user, passwd=passwd, port=port, db_driver=jar_path)
+ return params
+
+ def connect(self):
+ if self.connection_pool is None:
+ self.connection_pool = pool.QueuePool(self.get_connection, max_overflow=10, pool_size=5, recycle=600)
+ conn = self.connection_pool.connect()
+ cursor = conn.cursor()
+ return conn, cursor