diff --git a/bbutil/__init__.py b/bbutil/__init__.py
index 9255076..0c14292 100644
--- a/bbutil/__init__.py
+++ b/bbutil/__init__.py
@@ -21,15 +21,15 @@ from bbutil.logging import Logging
 
 __all__ = [
     "database",
-    "logging",
     "lang",
+    "logging",
+    "worker",
 
     "data",
     "file",
     "utils",
 
     "log",
-
     "set_log"
 ]
 
diff --git a/bbutil/worker/__init__.py b/bbutil/worker/__init__.py
new file mode 100644
index 0000000..33e645f
--- /dev/null
+++ b/bbutil/worker/__init__.py
@@ -0,0 +1,141 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+#    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.
+#
+#    Copyright (C) 2017, Kai Raphahn <kai.raphahn@laburec.de>
+#
+
+import abc
+import threading
+import time
+
+from abc import ABCMeta
+from dataclasses import dataclass
+from typing import Optional
+
+import bbutil
+from bbutil.worker.callback import Callback
+
+__all__ = [
+    "Worker",
+
+    "callback"
+]
+
+
+@dataclass
+class Worker(metaclass=ABCMeta):
+
+    id: str = ""
+    abort: bool = False
+    interval: float = 0.01
+
+    _callback: Optional[Callback] = None
+    _error: bool = False
+    _running: bool = True
+
+    @property
+    def error(self) -> bool:
+        return self._error
+
+    @abc.abstractmethod
+    def prepare(self) -> bool:
+        pass
+
+    @abc.abstractmethod
+    def run(self) -> bool:
+        pass
+
+    @abc.abstractmethod
+    def close(self) -> bool:
+        pass
+
+    def set_callback(self, **kwargs):
+        if self._callback is None:
+            self._callback = Callback()
+
+        self._callback.set_callback(**kwargs)
+        return
+
+    def _do_step(self, step: str, function, callback_func):
+        if self.abort is True:
+            self._running = False
+            self.abort = False
+            self._callback.do_abort()
+            bbutil.log.warn(self.id, "Abort {0:s}".format(step))
+            return
+
+        callback_func()
+
+        _check = function()
+        if _check is False:
+            self._error = True
+            bbutil.log.error("{0:s}: {1:s} failed!".format(self.id, step))
+
+        if self._error is True:
+            self._running = False
+        return
+
+    def _execute(self):
+        if self._callback is None:
+            self._callback = Callback()
+
+        self._running = True
+        self._callback.do_start()
+
+        self._do_step("prepare", self.prepare, self._callback.do_prepare)
+        if self._running is False:
+            self._callback.do_stop()
+            return
+
+        self._do_step("run", self.run, self._callback.do_run)
+        if self._running is False:
+            self._callback.do_stop()
+            return
+
+        self._do_step("close", self.close, self._callback.do_close)
+        if self._running is False:
+            self._callback.do_stop()
+            return
+
+        self._callback.do_stop()
+        self._running = False
+        return
+
+    def start(self):
+        _t = threading.Thread(target=self._execute)
+        _t.start()
+        return
+
+    @property
+    def is_running(self):
+        return self._running
+
+    def wait(self):
+        _run = True
+
+        while _run is True:
+            time.sleep(self.interval)
+
+            if self._running is False:
+                _run = False
+        return
+
+    def execute(self) -> bool:
+        self._execute()
+
+        if self._error is True:
+            return False
+
+        return True
diff --git a/bbutil/worker/callback.py b/bbutil/worker/callback.py
new file mode 100644
index 0000000..15c936c
--- /dev/null
+++ b/bbutil/worker/callback.py
@@ -0,0 +1,95 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+#    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.
+#
+#    Copyright (C) 2017, Kai Raphahn <kai.raphahn@laburec.de>
+#
+
+__all__ = [
+    "Callback"
+]
+
+
+class Callback(object):
+
+    def __init__(self):
+        self.start = None
+        self.stop = None
+        self.prepare = None
+        self.run = None
+        self.close = None
+        self.abort = None
+        return
+
+    def set_callback(self, **kwargs):
+        _value = kwargs.get("start", None)
+        if _value is not None:
+            self.start = _value
+
+        _value = kwargs.get("stop", None)
+        if _value is not None:
+            self.stop = _value
+
+        _value = kwargs.get("prepare", None)
+        if _value is not None:
+            self.prepare = _value
+
+        _value = kwargs.get("run", None)
+        if _value is not None:
+            self.run = _value
+
+        _value = kwargs.get("close", None)
+        if _value is not None:
+            self.close = _value
+
+        _value = kwargs.get("abort", None)
+        if _value is not None:
+            self.abort = _value
+        return
+
+    def do_start(self):
+        if self.start is None:
+            return
+        self.start()
+        return
+
+    def do_stop(self):
+        if self.stop is None:
+            return
+        self.stop()
+        return
+
+    def do_prepare(self):
+        if self.prepare is None:
+            return
+        self.prepare()
+        return
+
+    def do_run(self):
+        if self.run is None:
+            return
+        self.run()
+        return
+
+    def do_close(self):
+        if self.close is None:
+            return
+        self.close()
+        return
+
+    def do_abort(self):
+        if self.abort is None:
+            return
+        self.abort()
+        return

diff --git a/tests.json b/tests.json
index d2214b2..233519e 100644
--- a/tests.json
+++ b/tests.json
@@ -330,7 +330,7 @@
             ]
         },
         {
-            "id": "File.File",
+            "id": "File",
             "path": "tests.file",
             "classname": "TestFile",
             "tests": [
@@ -355,6 +355,21 @@
                 "test_folder_06",
                 "test_folder_07"
             ]
+        },
+        {
+            "id": "Worker",
+            "path": "tests.worker",
+            "classname": "TestWorker",
+            "tests": [
+                "test_worker_01",
+                "test_worker_02",
+                "test_worker_03",
+                "test_worker_04",
+                "test_worker_05",
+                "test_worker_06",
+                "test_worker_07",
+                "test_worker_08"
+            ]
         }
     ]
 }
diff --git a/tests/helper/__init__.py b/tests/helper/__init__.py
index f23f667..71630bf 100644
--- a/tests/helper/__init__.py
+++ b/tests/helper/__init__.py
@@ -29,6 +29,7 @@ __all__ = [
     "file",
     "sqlite",
     "table",
+    "worker",
 
     "get_sqlite",
     "set_log"
diff --git a/tests/helper/worker.py b/tests/helper/worker.py
new file mode 100644
index 0000000..08cbc1e
--- /dev/null
+++ b/tests/helper/worker.py
@@ -0,0 +1,127 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+#    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.
+#
+#    Copyright (C) 2017, Kai Raphahn <kai.raphahn@laburec.de>
+#
+
+from typing import List
+from dataclasses import dataclass, field
+
+import bbutil
+
+from bbutil.worker import Worker
+
+__all__ = [
+    "CallManager",
+    "Worker01",
+    "Worker02"
+]
+
+
+@dataclass
+class CallManager(object):
+
+    start: int = 0
+    stop: int = 0
+    prepare: int = 0
+    run: int = 0
+    close: int = 0
+    abort: int = 0
+
+    def count(self, name: str):
+        _value = getattr(self, name)
+        _value += 1
+        setattr(self, name, _value)
+        return
+
+    def setup(self, worker: Worker):
+        worker.set_callback(start=lambda: self.count("start"))
+        worker.set_callback(stop=lambda: self.count("stop"))
+        worker.set_callback(prepare=lambda: self.count("prepare"))
+        worker.set_callback(run=lambda: self.count("run"))
+        worker.set_callback(close=lambda: self.count("close"))
+        worker.set_callback(abort=lambda: self.count("abort"))
+        return
+
+    def info(self):
+        bbutil.log.inform("start", "{0:d}".format(self.start))
+        bbutil.log.inform("stop", "{0:d}".format(self.stop))
+        bbutil.log.inform("prepare", "{0:d}".format(self.prepare))
+        bbutil.log.inform("run", "{0:d}".format(self.run))
+        bbutil.log.inform("close", "{0:d}".format(self.close))
+        bbutil.log.inform("abort", "{0:d}".format(self.abort))
+        return
+
+
+@dataclass
+class Worker01(Worker):
+
+    exit_prepare: bool = True
+    exit_run: bool = True
+    exit_close: bool = True
+
+    def prepare(self) -> bool:
+        return self.exit_prepare
+
+    def run(self) -> bool:
+        return self.exit_run
+
+    def close(self) -> bool:
+        return self.exit_close
+
+
+@dataclass
+class Worker02(Worker):
+
+    max: int = 50000
+    iterate_list: List[int] = field(default_factory=list)
+
+    def prepare(self) -> bool:
+        _max = self.max
+        _range = range(0, _max)
+        _progress = bbutil.log.progress(_max)
+
+        for n in _range:
+            self.iterate_list.append(n)
+            _progress.inc()
+
+        bbutil.log.clear()
+        return True
+
+    def run(self) -> bool:
+        _max = len(self.iterate_list)
+        _progress = bbutil.log.progress(_max)
+
+        n = 0
+        for x in self.iterate_list:
+            self.iterate_list[n] = x + 1
+            _progress.inc()
+            n += 1
+
+        bbutil.log.clear()
+        return True
+
+    def close(self) -> bool:
+        _max = len(self.iterate_list)
+        _progress = bbutil.log.progress(_max)
+
+        n = 0
+        for x in self.iterate_list:
+            self.iterate_list[n] = x - 1
+            _progress.inc()
+            n += 1
+
+        bbutil.log.clear()
+        return True
diff --git a/tests/worker.py b/tests/worker.py
new file mode 100644
index 0000000..fb6fac0
--- /dev/null
+++ b/tests/worker.py
@@ -0,0 +1,172 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+#    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.
+#
+#    Copyright (C) 2017, Kai Raphahn <kai.raphahn@laburec.de>
+#
+
+import unittest
+
+import unittest.mock as mock
+
+from tests.helper import set_log
+from tests.helper.worker import CallManager, Worker01, Worker02
+
+__all__ = [
+    "TestWorker"
+]
+
+oserror = OSError("Something strange did happen!")
+mock_oserror = mock.Mock(side_effect=oserror)
+mock_remove = mock.Mock()
+
+
+class TestWorker(unittest.TestCase):
+    """Testing class for locking module."""
+
+    def setUp(self):
+        set_log()
+        return
+
+    def test_worker_01(self):
+        _worker = Worker01(id="Worker01")
+
+        _check = _worker.execute()
+        self.assertTrue(_check)
+        self.assertFalse(_worker.error)
+        return
+
+    def test_worker_02(self):
+        _calls = CallManager()
+        _worker = Worker01(id="Worker01")
+        _calls.setup(_worker)
+
+        _worker.start()
+        _worker.wait()
+
+        self.assertFalse(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 1)
+        self.assertEqual(_calls.close, 1)
+        self.assertEqual(_calls.abort, 0)
+        return
+
+    def test_worker_03(self):
+        _calls = CallManager()
+        _worker = Worker01(id="Worker01", exit_prepare=False)
+        _calls.setup(_worker)
+
+        _check = _worker.execute()
+        self.assertFalse(_check)
+        self.assertTrue(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 0)
+        self.assertEqual(_calls.close, 0)
+        self.assertEqual(_calls.abort, 0)
+        return
+
+    def test_worker_04(self):
+        _calls = CallManager()
+        _worker = Worker01(id="Worker01", exit_run=False)
+        _calls.setup(_worker)
+
+        _check = _worker.execute()
+        self.assertFalse(_check)
+        self.assertTrue(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 1)
+        self.assertEqual(_calls.close, 0)
+        self.assertEqual(_calls.abort, 0)
+        return
+
+    def test_worker_05(self):
+        _calls = CallManager()
+        _worker = Worker01(id="Worker01", exit_close=False)
+        _calls.setup(_worker)
+
+        _check = _worker.execute()
+        self.assertFalse(_check)
+        self.assertTrue(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 1)
+        self.assertEqual(_calls.close, 1)
+        self.assertEqual(_calls.abort, 0)
+        return
+
+    def test_worker_06(self):
+        _calls = CallManager()
+        _worker = Worker01(id="Worker01")
+        _calls.setup(_worker)
+
+        _worker.start()
+        _worker.wait()
+
+        self.assertFalse(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 1)
+        self.assertEqual(_calls.close, 1)
+        self.assertEqual(_calls.abort, 0)
+        return
+
+    def test_worker_07(self):
+        _calls = CallManager()
+        _worker = Worker02(id="Worker02", max=250000)
+        _calls.setup(_worker)
+
+        _worker.start()
+        _check1 = _worker.is_running
+        _worker.abort = True
+
+        _worker.wait()
+        self.assertFalse(_worker.error)
+
+        _calls.info()
+        self.assertEqual(_calls.start, 1)
+        self.assertEqual(_calls.stop, 1)
+        self.assertEqual(_calls.prepare, 1)
+        self.assertEqual(_calls.run, 0)
+        self.assertEqual(_calls.close, 0)
+        self.assertEqual(_calls.abort, 1)
+        return
+
+    def test_worker_08(self):
+        _worker = Worker02(id="Worker02", max=250000)
+
+        _worker.start()
+        _check1 = _worker.is_running
+        _worker.abort = True
+
+        _worker.wait()
+        self.assertFalse(_worker.error)
+        return

Add a worker class
Add a worker class with prepare, run and close, also for threading.
tests/worker.py::TestWorker::test_worker_01 tests/worker.py::TestWorker::test_worker_02 tests/worker.py::TestWorker::test_worker_03 tests/worker.py::TestWorker::test_worker_04 tests/worker.py::TestWorker::test_worker_05 tests/worker.py::TestWorker::test_worker_06 tests/worker.py::TestWorker::test_worker_07 tests/worker.py::TestWorker::test_worker_08