io.netty.channel.DefaultChannelId Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2013 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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 io.netty.channel;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.MacAddressUtil;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicInteger;
import static io.netty.util.internal.MacAddressUtil.defaultMachineId;
import static io.netty.util.internal.MacAddressUtil.parseMAC;
/**
* The default {@link ChannelId} implementation.
*/
public final class DefaultChannelId implements ChannelId {
private static final long serialVersionUID = 3884076183504074063L;
private static final InternalLogger logger = InternalLoggerFactory.getInstance(DefaultChannelId.class);
private static final byte[] MACHINE_ID;
private static final int PROCESS_ID_LEN = 4;
private static final int PROCESS_ID;
private static final int SEQUENCE_LEN = 4;
private static final int TIMESTAMP_LEN = 8;
private static final int RANDOM_LEN = 4;
private static final AtomicInteger nextSequence = new AtomicInteger();
/**
* Returns a new {@link DefaultChannelId} instance.
*/
public static DefaultChannelId newInstance() {
return new DefaultChannelId();
}
static {
int processId = -1;
String customProcessId = SystemPropertyUtil.get("io.netty.processId");
if (customProcessId != null) {
try {
processId = Integer.parseInt(customProcessId);
} catch (NumberFormatException e) {
// Malformed input.
}
if (processId < 0) {
processId = -1;
logger.warn("-Dio.netty.processId: {} (malformed)", customProcessId);
} else if (logger.isDebugEnabled()) {
logger.debug("-Dio.netty.processId: {} (user-set)", processId);
}
}
if (processId < 0) {
processId = defaultProcessId();
if (logger.isDebugEnabled()) {
logger.debug("-Dio.netty.processId: {} (auto-detected)", processId);
}
}
PROCESS_ID = processId;
byte[] machineId = null;
String customMachineId = SystemPropertyUtil.get("io.netty.machineId");
if (customMachineId != null) {
try {
machineId = parseMAC(customMachineId);
} catch (Exception e) {
logger.warn("-Dio.netty.machineId: {} (malformed)", customMachineId, e);
}
if (machineId != null) {
logger.debug("-Dio.netty.machineId: {} (user-set)", customMachineId);
}
}
if (machineId == null) {
machineId = defaultMachineId();
if (logger.isDebugEnabled()) {
logger.debug("-Dio.netty.machineId: {} (auto-detected)", MacAddressUtil.formatAddress(machineId));
}
}
MACHINE_ID = machineId;
}
static int processHandlePid(ClassLoader loader) {
// pid is positive on unix, non{-1,0} on windows
int nilValue = -1;
if (PlatformDependent.javaVersion() >= 9) {
Long pid;
try {
Class processHandleImplType = Class.forName("java.lang.ProcessHandle", true, loader);
Method processHandleCurrent = processHandleImplType.getMethod("current");
Object processHandleInstance = processHandleCurrent.invoke(null);
Method processHandlePid = processHandleImplType.getMethod("pid");
pid = (Long) processHandlePid.invoke(processHandleInstance);
} catch (Exception e) {
logger.debug("Could not invoke ProcessHandle.current().pid();", e);
return nilValue;
}
if (pid > Integer.MAX_VALUE || pid < Integer.MIN_VALUE) {
throw new IllegalStateException("Current process ID exceeds int range: " + pid);
}
return pid.intValue();
}
return nilValue;
}
static int jmxPid(ClassLoader loader) {
String value;
try {
// Invoke java.lang.management.ManagementFactory.getRuntimeMXBean().getName()
Class mgmtFactoryType = Class.forName("java.lang.management.ManagementFactory", true, loader);
Class runtimeMxBeanType = Class.forName("java.lang.management.RuntimeMXBean", true, loader);
Method getRuntimeMXBean = mgmtFactoryType.getMethod("getRuntimeMXBean", EmptyArrays.EMPTY_CLASSES);
Object bean = getRuntimeMXBean.invoke(null, EmptyArrays.EMPTY_OBJECTS);
Method getName = runtimeMxBeanType.getMethod("getName", EmptyArrays.EMPTY_CLASSES);
value = (String) getName.invoke(bean, EmptyArrays.EMPTY_OBJECTS);
} catch (Throwable t) {
logger.debug("Could not invoke ManagementFactory.getRuntimeMXBean().getName(); Android?", t);
try {
// Invoke android.os.Process.myPid()
Class processType = Class.forName("android.os.Process", true, loader);
Method myPid = processType.getMethod("myPid", EmptyArrays.EMPTY_CLASSES);
value = myPid.invoke(null, EmptyArrays.EMPTY_OBJECTS).toString();
} catch (Throwable t2) {
logger.debug("Could not invoke Process.myPid(); not Android?", t2);
value = "";
}
}
int atIndex = value.indexOf('@');
if (atIndex >= 0) {
value = value.substring(0, atIndex);
}
int pid;
try {
pid = Integer.parseInt(value);
} catch (NumberFormatException e) {
// value did not contain an integer.
pid = -1;
}
if (pid < 0) {
pid = PlatformDependent.threadLocalRandom().nextInt();
logger.warn("Failed to find the current process ID from '{}'; using a random value: {}", value, pid);
}
return pid;
}
static int defaultProcessId() {
ClassLoader loader = PlatformDependent.getClassLoader(DefaultChannelId.class);
int processId = processHandlePid(loader);
if (processId != -1) {
return processId;
}
return jmxPid(loader);
}
private final byte[] data;
private final int hashCode;
private transient String shortValue;
private transient String longValue;
private DefaultChannelId() {
data = new byte[MACHINE_ID.length + PROCESS_ID_LEN + SEQUENCE_LEN + TIMESTAMP_LEN + RANDOM_LEN];
int i = 0;
// machineId
System.arraycopy(MACHINE_ID, 0, data, i, MACHINE_ID.length);
i += MACHINE_ID.length;
// processId
i = writeInt(i, PROCESS_ID);
// sequence
i = writeInt(i, nextSequence.getAndIncrement());
// timestamp (kind of)
i = writeLong(i, Long.reverse(System.nanoTime()) ^ System.currentTimeMillis());
// random
int random = PlatformDependent.threadLocalRandom().nextInt();
i = writeInt(i, random);
assert i == data.length;
hashCode = Arrays.hashCode(data);
}
private int writeInt(int i, int value) {
data[i ++] = (byte) (value >>> 24);
data[i ++] = (byte) (value >>> 16);
data[i ++] = (byte) (value >>> 8);
data[i ++] = (byte) value;
return i;
}
private int writeLong(int i, long value) {
data[i ++] = (byte) (value >>> 56);
data[i ++] = (byte) (value >>> 48);
data[i ++] = (byte) (value >>> 40);
data[i ++] = (byte) (value >>> 32);
data[i ++] = (byte) (value >>> 24);
data[i ++] = (byte) (value >>> 16);
data[i ++] = (byte) (value >>> 8);
data[i ++] = (byte) value;
return i;
}
@Override
public String asShortText() {
String shortValue = this.shortValue;
if (shortValue == null) {
this.shortValue = shortValue = ByteBufUtil.hexDump(data, data.length - RANDOM_LEN, RANDOM_LEN);
}
return shortValue;
}
@Override
public String asLongText() {
String longValue = this.longValue;
if (longValue == null) {
this.longValue = longValue = newLongValue();
}
return longValue;
}
private String newLongValue() {
StringBuilder buf = new StringBuilder(2 * data.length + 5);
int i = 0;
i = appendHexDumpField(buf, i, MACHINE_ID.length);
i = appendHexDumpField(buf, i, PROCESS_ID_LEN);
i = appendHexDumpField(buf, i, SEQUENCE_LEN);
i = appendHexDumpField(buf, i, TIMESTAMP_LEN);
i = appendHexDumpField(buf, i, RANDOM_LEN);
assert i == data.length;
return buf.substring(0, buf.length() - 1);
}
private int appendHexDumpField(StringBuilder buf, int i, int length) {
buf.append(ByteBufUtil.hexDump(data, i, length));
buf.append('-');
i += length;
return i;
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public int compareTo(final ChannelId o) {
if (this == o) {
// short circuit
return 0;
}
if (o instanceof DefaultChannelId) {
// lexicographic comparison
final byte[] otherData = ((DefaultChannelId) o).data;
int len1 = data.length;
int len2 = otherData.length;
int len = Math.min(len1, len2);
for (int k = 0; k < len; k++) {
byte x = data[k];
byte y = otherData[k];
if (x != y) {
// treat these as unsigned bytes for comparison
return (x & 0xff) - (y & 0xff);
}
}
return len1 - len2;
}
return asLongText().compareTo(o.asLongText());
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof DefaultChannelId)) {
return false;
}
DefaultChannelId other = (DefaultChannelId) obj;
return hashCode == other.hashCode && Arrays.equals(data, other.data);
}
@Override
public String toString() {
return asShortText();
}
}