1 package org.apache.maven.cli;
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22 import java.io.PrintStream;
23 import java.util.Map;
24 import java.util.concurrent.ConcurrentHashMap;
25
26 import org.sonatype.aether.transfer.TransferCancelledException;
27 import org.sonatype.aether.transfer.TransferEvent;
28 import org.sonatype.aether.transfer.TransferResource;
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35 public class ConsoleMavenTransferListener
36 extends AbstractMavenTransferListener
37 {
38
39 private Map<TransferResource, Long> downloads = new ConcurrentHashMap<TransferResource, Long>();
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41 private int lastLength;
42
43 public ConsoleMavenTransferListener( PrintStream out )
44 {
45 super( out );
46 }
47
48 @Override
49 public void transferProgressed( TransferEvent event )
50 throws TransferCancelledException
51 {
52 TransferResource resource = event.getResource();
53 downloads.put( resource, Long.valueOf( event.getTransferredBytes() ) );
54
55 StringBuilder buffer = new StringBuilder( 64 );
56
57 for ( Map.Entry<TransferResource, Long> entry : downloads.entrySet() )
58 {
59 long total = entry.getKey().getContentLength();
60 Long complete = entry.getValue();
61
62 if ( complete != null )
63 {
64 buffer.append( getStatus( complete.longValue(), total ) ).append( " " );
65 }
66 }
67
68 int pad = lastLength - buffer.length();
69 lastLength = buffer.length();
70 pad( buffer, pad );
71 buffer.append( '\r' );
72
73 out.print( buffer );
74 }
75
76 private String getStatus( long complete, long total )
77 {
78 if ( total >= 1024 )
79 {
80 return toKB( complete ) + "/" + toKB( total ) + " KB ";
81 }
82 else if ( total >= 0 )
83 {
84 return complete + "/" + total + " B ";
85 }
86 else if ( complete >= 1024 )
87 {
88 return toKB( complete ) + " KB ";
89 }
90 else
91 {
92 return complete + " B ";
93 }
94 }
95
96 private void pad( StringBuilder buffer, int spaces )
97 {
98 String block = " ";
99 while ( spaces > 0 )
100 {
101 int n = Math.min( spaces, block.length() );
102 buffer.append( block, 0, n );
103 spaces -= n;
104 }
105 }
106
107 @Override
108 public void transferSucceeded( TransferEvent event )
109 {
110 transferCompleted( event );
111
112 super.transferSucceeded( event );
113 }
114
115 @Override
116 public void transferFailed( TransferEvent event )
117 {
118 transferCompleted( event );
119
120 super.transferFailed( event );
121 }
122
123 private void transferCompleted( TransferEvent event )
124 {
125 downloads.remove( event.getResource() );
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127 StringBuilder buffer = new StringBuilder( 64 );
128 pad( buffer, lastLength );
129 buffer.append( '\r' );
130 out.print( buffer );
131 }
132
133 }