package com.alibaba.json.test;
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import com.alibaba.fastjson.util.IOUtils;
public class TestUtils {
// ****************************************************************************************
// * char[] version
// ****************************************************************************************
/**
* Encodes a raw byte array into a BASE64 <code>char[]</code> representation i accordance with RFC 2045.
*
* @param sArr The bytes to convert. If <code>null</code> or length 0 an empty array will be returned.
* @param lineSep Optional "\r\n" after 76 characters, unless end of file.<br>
* No line separator will be in breach of RFC 2045 which specifies max 76 per line but will be a little faster.
* @return A BASE64 encoded array. Never <code>null</code>.
*/
private final static char[] encodeToChar(byte[] sArr, boolean lineSep) {
char[] CA = IOUtils.CA;
// Check special case
int sLen = sArr != null ? sArr.length : 0;
if (sLen == 0) return new char[0];
int eLen = (sLen / 3) * 3; // Length of even 24-bits.
int cCnt = ((sLen - 1) / 3 + 1) << 2; // Returned character count
int dLen = cCnt + (lineSep ? (cCnt - 1) / 76 << 1 : 0); // Length of returned array
char[] dArr = new char[dLen];
// Encode even 24-bits
for (int s = 0, d = 0, cc = 0; s < eLen;) {
// Copy next three bytes into lower 24 bits of int, paying attension to sign.
int i = (sArr[s++] & 0xff) << 16 | (sArr[s++] & 0xff) << 8 | (sArr[s++] & 0xff);
// Encode the int into four chars
dArr[d++] = CA[(i >>> 18) & 0x3f];
dArr[d++] = CA[(i >>> 12) & 0x3f];
dArr[d++] = CA[(i >>> 6) & 0x3f];
dArr[d++] = CA[i & 0x3f];
// Add optional line separator
if (lineSep && ++cc == 19 && d < dLen - 2) {
dArr[d++] = '\r';
dArr[d++] = '\n';
cc = 0;
}
}
// Pad and encode last bits if source isn't even 24 bits.
int left = sLen - eLen; // 0 - 2.
if (left > 0) {
// Prepare the int
int i = ((sArr[eLen] & 0xff) << 10) | (left == 2 ? ((sArr[sLen - 1] & 0xff) << 2) : 0);
// Set last four chars
dArr[dLen - 4] = CA[i >> 12];
dArr[dLen - 3] = CA[(i >>> 6) & 0x3f];
dArr[dLen - 2] = left == 2 ? CA[i & 0x3f] : '=';
dArr[dLen - 1] = '=';
}
return dArr;
}
// ****************************************************************************************
// * String version
// ****************************************************************************************
/**
* Encodes a raw byte array into a BASE64 <code>String</code> representation i accordance with RFC 2045.
*
* @param sArr The bytes to convert. If <code>null</code> or length 0 an empty array will be returned.
* @param lineSep Optional "\r\n" after 76 characters, unless end of file.<br>
* No line separator will be in breach of RFC 2045 which specifies max 76 per line but will be a little faster.
* @return A BASE64 encoded array. Never <code>null</code>.
*/
public final static String encodeToBase64String(byte[] sArr, boolean lineSep) {
// Reuse char[] since we can't create a String incrementally anyway and StringBuffer/Builder would be slower.
return new String(encodeToChar(sArr, lineSep));
}
public static long getYoungGC() {
try {
// java.lang:type=GarbageCollector,name=G1 Young Generation
// java.lang:type=GarbageCollector,name=G1 Old Generation
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ParNew"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ParNew");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=Copy"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=Copy");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS Scavenge");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionCount");
} catch (Exception e) {
throw new RuntimeException("error");
}
}
public static long getYoungGCTime() {
try {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ParNew"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ParNew");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=Copy"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=Copy");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS Scavenge");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionTime");
} catch (Exception e) {
throw new RuntimeException("error", e);
}
}
public static long getFullGC() {
try {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=MarkSweepCompact"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=MarkSweepCompact");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Old Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Old Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS MarkSweep");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionCount");
} catch (Exception e) {
throw new RuntimeException("error");
}
}
}