-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
SuspendableLifeCycle.java
98 lines (85 loc) · 2.55 KB
/
SuspendableLifeCycle.java
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
/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.causalclustering.helper;
import org.neo4j.kernel.lifecycle.Lifecycle;
import org.neo4j.logging.Log;
public abstract class SuspendableLifeCycle implements Lifecycle, Suspendable
{
private final Log debugLog;
private boolean stoppedByLifeCycle = true;
private boolean enabled = true;
public SuspendableLifeCycle( Log debugLog )
{
this.debugLog = debugLog;
}
@Override
public final synchronized void enable() throws Throwable
{
if ( !stoppedByLifeCycle )
{
start0();
}
else
{
debugLog.info( "%s will not start. It was enabled but is stopped by lifecycle", this );
}
enabled = true;
}
@Override
public final synchronized void disable() throws Throwable
{
stop0();
enabled = false;
}
@Override
public final synchronized void init() throws Throwable
{
init0();
}
@Override
public final synchronized void start() throws Throwable
{
if ( !enabled )
{
debugLog.info( "Start call from lifecycle is ignored because %s is disabled.", this );
}
else
{
start0();
}
stoppedByLifeCycle = false;
}
@Override
public final synchronized void stop() throws Throwable
{
stop0();
stoppedByLifeCycle = true;
}
@Override
public final synchronized void shutdown() throws Throwable
{
shutdown0();
stoppedByLifeCycle = true;
}
protected abstract void init0() throws Throwable;
protected abstract void start0() throws Throwable;
protected abstract void stop0() throws Throwable;
protected abstract void shutdown0() throws Throwable;
}