/**
* Validate streams generate the same output.
*
* @param expIn Expected input stream.
* @param actIn Actual input stream.
* @param expSize Expected size of the streams.
* @param seek Seek to use async position-based reading or {@code null} to use simple continuous
* reading.
* @throws IOException In case of any IO exception.
*/
private void assertEqualStreams(
InputStream expIn, GridGgfsInputStream actIn, @Nullable Long expSize, @Nullable Long seek)
throws IOException {
if (seek != null) expIn.skip(seek);
int bufSize = 2345;
byte buf1[] = new byte[bufSize];
byte buf2[] = new byte[bufSize];
long pos = 0;
long start = System.currentTimeMillis();
while (true) {
int read = (int) Math.min(bufSize, expSize - pos);
int i1;
if (seek == null) i1 = actIn.read(buf1, 0, read);
else if (seek % 2 == 0) i1 = actIn.read(pos + seek, buf1, 0, read);
else {
i1 = read;
actIn.readFully(pos + seek, buf1, 0, read);
}
// Read at least 0 byte, but don't read more then 'i1' or 'read'.
int i2 = expIn.read(buf2, 0, Math.max(0, Math.min(i1, read)));
if (i1 != i2) {
fail(
"Expects the same data [read="
+ read
+ ", pos="
+ pos
+ ", seek="
+ seek
+ ", i1="
+ i1
+ ", i2="
+ i2
+ ']');
}
if (i1 == -1) break; // EOF
// i1 == bufSize => compare buffers.
// i1 < bufSize => Compare part of buffers, rest of buffers are equal from previous
// iteration.
assertTrue(
"Expects the same data [read="
+ read
+ ", pos="
+ pos
+ ", seek="
+ seek
+ ", i1="
+ i1
+ ", i2="
+ i2
+ ']',
Arrays.equals(buf1, buf2));
if (read == 0) break; // Nothing more to read.
pos += i1;
}
if (expSize != null) assertEquals(expSize.longValue(), pos);
long time = System.currentTimeMillis() - start;
if (time != 0 && log.isInfoEnabled()) {
log.info(
String.format(
"Streams were compared in continuous reading " + "[size=%7d, rate=%3.1f MB/sec]",
expSize, expSize * 1000. / time / 1024 / 1024));
}
}
@Override
public int compare(VisorGgfsProfilerEntry a, VisorGgfsProfilerEntry b) {
return Long.compare(a.timestamp, b.timestamp);
}