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Merge pull request #14 from Dynatrace/release_130
Prepare release v1.3.0
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| Original file line number | Diff line number | Diff line change |
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| # OneAgent SDK for Python forking sample | ||
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| This example demonstrates how to use the [OneAgent SDK for | ||
| Python](https://github.com/Dynatrace/OneAgent-SDK-for-Python) with forked child processes. |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,128 @@ | ||
| # -*- coding: utf-8 -*- | ||
| # | ||
| # Copyright 2019 Dynatrace LLC | ||
| # | ||
| # 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. | ||
|
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| '''This example demonstrates how to use the OneAgent SDK for Python in a | ||
| parent/child process environment. The OneAgent SDK for Python will be initialized | ||
| in the parent process and the child processes can then use the SDK. | ||
| Note: this example will only work on Linux. There's no Windows support available. | ||
| ''' | ||
|
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| import os | ||
| import sys | ||
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| import oneagent # SDK initialization functions | ||
| import oneagent.sdk as onesdk # All other SDK functions. | ||
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| try: # Python 2 compatibility. | ||
| input = raw_input #pylint:disable=redefined-builtin | ||
| except NameError: | ||
| pass | ||
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| getsdk = oneagent.get_sdk # Just to make the code shorter. | ||
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| def do_some_fancy_stuff(proc_number): | ||
| sdk = getsdk() | ||
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| # The agent state in the child process should be ACTIVE (0). | ||
| print('Agent state (child process #{}): {}'.format(proc_number, sdk.agent_state), flush=True) | ||
|
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| print('Agent found:', sdk.agent_found) | ||
| print('Agent is compatible:', sdk.agent_is_compatible) | ||
| print('Agent version:', sdk.agent_version_string) | ||
|
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| # This call below will complete the OneAgent for Python SDK initialization and then it | ||
| # will start the tracer for tracing the custom service | ||
| with sdk.trace_custom_service('my_fancy_transaction', 'MyFancyService #{}'.format(proc_number)): | ||
| print('do some fancy stuff') | ||
|
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| def create_child_process(proc_number): | ||
| pid = os.fork() | ||
| if pid == 0: | ||
| print('child #{} is running ...'.format(proc_number)) | ||
| do_some_fancy_stuff(proc_number) | ||
| print('child #{} is exiting ...'.format(proc_number)) | ||
| sys.exit(0) | ||
|
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| return pid | ||
|
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| def fork_children(): | ||
| print('now starting children ...', flush=True) | ||
| pid_1 = create_child_process(1) | ||
| pid_2 = create_child_process(2) | ||
|
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| print('waiting for child #1 ...', flush=True) | ||
| os.waitpid(pid_1, 0) | ||
| print('child #1 exited', flush=True) | ||
|
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| print('waiting for child #2 ...', flush=True) | ||
| os.waitpid(pid_2, 0) | ||
| print('child #2 exited', flush=True) | ||
|
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| print('all children exited', flush=True) | ||
|
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| def main(): | ||
| # This gathers arguments prefixed with '--dt_' from sys.argv into the | ||
| # returned list. See also the basic-sdk-sample. | ||
| sdk_options = oneagent.sdkopts_from_commandline(remove=True) | ||
|
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| # Before using the SDK you have to initialize the OneAgent. In this scenario, we | ||
| # initialize the SDK and prepare it for forking. | ||
| # | ||
| # Passing in the sdk_options is entirely optional and usually not required | ||
| # as all settings will be automatically provided by the Dynatrace OneAgent | ||
| # that is installed on the host. | ||
| # | ||
| # To activate the forking support add the optional 'forkable' parameter and set it to True. | ||
| # | ||
| # If you run this example on Windows then you'll get an "Invalid Argument" error back | ||
| # because there's no forking support for Windows available. | ||
| init_result = oneagent.initialize(sdk_options, forkable=True) | ||
| try: | ||
| if init_result.error is not None: | ||
| print('Error during SDK initialization:', init_result.error) | ||
|
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| # While not by much, it is a bit faster to cache the result of | ||
| # oneagent.get_sdk() instead of calling the function multiple times. | ||
| sdk = getsdk() | ||
|
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| # The agent state is one of the integers in oneagent.sdk.AgentState. | ||
| # Since we're using the 'forkable' mode the state will be TEMPORARILY_INACTIVE (1) on Linux. | ||
| print('Agent state (parent process):', sdk.agent_state) | ||
|
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| # The instance attribute 'agent_found' indicates whether an agent could be found or not. | ||
| print('Agent found:', sdk.agent_found) | ||
|
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| # If an agent was found but it is incompatible with this version of the SDK for Python | ||
| # then 'agent_is_compatible' would be set to false. | ||
| print('Agent is compatible:', sdk.agent_is_compatible) | ||
|
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| # The agent version is a string holding both the OneAgent version and the | ||
| # OneAgent SDK for C/C++ version separated by a '/'. | ||
| print('Agent version:', sdk.agent_version_string) | ||
|
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| if init_result.error is None: | ||
| fork_children() | ||
| input('Now wait until the path appears in the UI ...') | ||
| finally: | ||
| shutdown_error = oneagent.shutdown() | ||
| if shutdown_error: | ||
| print('Error shutting down SDK:', shutdown_error) | ||
|
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| if __name__ == '__main__': | ||
| main() |
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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env python3 | ||
| # | ||
| # Copyright 2018 Dynatrace LLC | ||
| # | ||
| # 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. | ||
|
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| import io | ||
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| from setuptools import setup | ||
|
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| with io.open('README.md', encoding='utf-8') as readmefile: | ||
| long_description = readmefile.read() | ||
| del readmefile | ||
|
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| setup( | ||
| py_modules=['fork_sdk_sample'], | ||
| zip_safe=True, | ||
| name='oneagent-sdk-fork-sample', | ||
| version='0.0', # This sample is not separately versioned | ||
|
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| install_requires=['oneagent-sdk==1.*,>=1.3'], | ||
|
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| description='OneAgent SDK for Python: Fork sample application', | ||
| long_description=long_description, | ||
| long_description_content_type='text/markdown', | ||
| url='https://github.com/Dynatrace/OneAgent-SDK-for-Python', | ||
| maintainer='Dynatrace LLC', | ||
| maintainer_email='[email protected]', | ||
| license='Apache License 2.0', | ||
| entry_points={ | ||
| 'console_scripts': ['oneagent-sdk-basic-sample=fork_sdk_sample:main'], | ||
| }, | ||
| classifiers=[ | ||
| 'Intended Audience :: Developers', | ||
| 'License :: OSI Approved', | ||
| 'License :: OSI Approved :: Apache Software License', # 2.0 | ||
| 'Programming Language :: Python', | ||
| 'Programming Language :: Python :: 2', | ||
| 'Programming Language :: Python :: 2.7', | ||
| 'Programming Language :: Python :: 3', | ||
| 'Programming Language :: Python :: Implementation :: CPython', | ||
| 'Operating System :: POSIX :: Linux', | ||
| 'Operating System :: Microsoft :: Windows', | ||
| 'Topic :: System :: Monitoring' | ||
| ]) |
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