-
Notifications
You must be signed in to change notification settings - Fork 3.4k
/
BlockingRowSet.java
139 lines (119 loc) · 3.71 KB
/
BlockingRowSet.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
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
/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.com
*
*******************************************************************************
*
* 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.
*
******************************************************************************/
package org.pentaho.di.core;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import org.pentaho.di.core.row.RowMetaInterface;
/**
* Contains a buffer of rows. Getting rows from the buffer or putting rows in the buffer is synchronized to allow
* concurrent use of multiple Threads.
*
* @author Matt
* @since 04-04-2003
*
*/
public class BlockingRowSet extends BaseRowSet implements Comparable<RowSet>, RowSet {
private BlockingQueue<Object[]> queArray;
private int timeoutPut;
private int timeoutGet;
/**
* Create new non-blocking-queue with maxSize capacity.
*
* @param maxSize
*/
public BlockingRowSet( int maxSize ) {
super();
// create an empty queue
queArray = new ArrayBlockingQueue<Object[]>( maxSize, false );
timeoutGet = Const.toInt( System.getProperty( Const.KETTLE_ROWSET_GET_TIMEOUT ), Const.TIMEOUT_GET_MILLIS );
timeoutPut = Const.toInt( System.getProperty( Const.KETTLE_ROWSET_PUT_TIMEOUT ), Const.TIMEOUT_PUT_MILLIS );
}
/*
* (non-Javadoc)
*
* @see org.pentaho.di.core.RowSetInterface#putRow(org.pentaho.di.core.row.RowMetaInterface, java.lang.Object[])
*/
@Override
public boolean putRow( RowMetaInterface rowMeta, Object[] rowData ) {
return putRowWait( rowMeta, rowData, timeoutPut, TimeUnit.MILLISECONDS );
}
/*
* (non-Javadoc)
*
* @see org.pentaho.di.core.RowSetInterface#putRowWait(org.pentaho.di.core.row.RowMetaInterface, java.lang.Object[],
* long, java.util.concurrent.TimeUnit)
*/
@Override
public boolean putRowWait( RowMetaInterface rowMeta, Object[] rowData, long time, TimeUnit tu ) {
this.rowMeta = rowMeta;
try {
return queArray.offer( rowData, time, tu );
} catch ( InterruptedException e ) {
return false;
} catch ( NullPointerException e ) {
return false;
}
}
// default getRow with wait time = 100ms
//
/*
* (non-Javadoc) System.getProperty("KETTLE_ROWSET_PUT_TIMEOUT")
*
* @see org.pentaho.di.core.RowSetInterface#getRow()
*/
@Override
public Object[] getRow() {
return getRowWait( timeoutGet, TimeUnit.MILLISECONDS );
}
/*
* (non-Javadoc)
*
* @see org.pentaho.di.core.RowSetInterface#getRowImmediate()
*/
@Override
public Object[] getRowImmediate() {
return queArray.poll();
}
/*
* (non-Javadoc)
*
* @see org.pentaho.di.core.RowSetInterface#getRowWait(long, java.util.concurrent.TimeUnit)
*/
@Override
public Object[] getRowWait( long timeout, TimeUnit tu ) {
try {
return queArray.poll( timeout, tu );
} catch ( InterruptedException e ) {
return null;
}
}
@Override
public int size() {
return queArray.size();
}
@Override
public void clear() {
queArray.clear();
done.set( false );
}
}