1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.clamp.controlloop.participant.policy.main.startstop;
import java.util.Arrays;
import javax.ws.rs.core.Response;
import lombok.Getter;
import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameterHandler;
import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
import org.onap.policy.common.utils.resources.MessageConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class initiates Policy Participant.
*/
public class Main {
private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
private ParticipantPolicyActivator activator;
@Getter
private ParticipantPolicyParameters parameterGroup;
/**
* Instantiates policy participant.
*
* @param args the command line arguments
*/
public Main(final String[] args) {
final String argumentString = Arrays.toString(args);
LOGGER.info("Starting the control loop participant service with arguments - {}", argumentString);
// Check the arguments
final ParticipantPolicyCommandLineArguments arguments = new ParticipantPolicyCommandLineArguments();
try {
// The arguments return a string if there is a message to print and we should exit
final String argumentMessage = arguments.parse(args);
if (argumentMessage != null) {
LOGGER.info(argumentMessage);
return;
}
// Validate that the arguments are sane
arguments.validate();
// Read the parameters
parameterGroup = new ParticipantPolicyParameterHandler().getParameters(arguments);
// Now, create the activator for the service
activator = new ParticipantPolicyActivator(parameterGroup);
// Start the activator
activator.start();
} catch (Exception exp) {
throw new ControlLoopRuntimeException(Response.Status.BAD_REQUEST,
String.format(MessageConstants.START_FAILURE_MSG, MessageConstants.POLICY_CLAMP), exp);
}
// Add a shutdown hook to shut everything down in an orderly manner
Runtime.getRuntime().addShutdownHook(new ClRuntimeShutdownHookClass());
String successMsg = String.format(MessageConstants.START_SUCCESS_MSG, MessageConstants.POLICY_CLAMP);
LOGGER.info(successMsg);
}
/**
* Check if main is running.
*/
public boolean isRunning() {
return activator != null && activator.isAlive();
}
/**
* Shut down Execution.
*
* @throws ControlLoopException on shutdown errors
*/
public void shutdown() throws ControlLoopException {
// clear the parameterGroup variable
parameterGroup = null;
// clear the cl participant activator
if (activator != null) {
activator.stop();
}
}
/**
* The Class ClRuntimeShutdownHookClass terminates the policy participant
* when its run method is called.
*/
private class ClRuntimeShutdownHookClass extends Thread {
/*
* (non-Javadoc)
*
* @see java.lang.Runnable#run()
*/
@Override
public void run() {
try {
// Shutdown the control loop participant service and wait for everything to stop
shutdown();
} catch (final RuntimeException | ControlLoopException e) {
LOGGER.warn("error occured during shut down of the policy participant", e);
}
}
}
/**
* The main method.
*
* @param args the arguments
*/
public static void main(final String[] args) { // NOSONAR
/*
* NOTE: arguments are validated by the constructor, thus sonar is disabled.
*/
new Main(args);
}
}
|
