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Util.java
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Util.java
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package org.jgroups.util;
import org.jgroups.*;
import org.jgroups.auth.AuthToken;
import org.jgroups.blocks.Connection;
import org.jgroups.conf.ClassConfigurator;
import org.jgroups.jmx.JmxConfigurator;
import org.jgroups.logging.Log;
import org.jgroups.logging.LogFactory;
import org.jgroups.protocols.*;
import org.jgroups.protocols.pbcast.FLUSH;
import org.jgroups.protocols.pbcast.GMS;
import org.jgroups.stack.IpAddress;
import org.jgroups.stack.ProtocolStack;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import java.io.*;
import java.lang.annotation.Annotation;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;
import java.security.MessageDigest;
import java.text.NumberFormat;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
/**
* Collection of various utility routines that can not be assigned to other classes.
* @author Bela Ban
*/
public class Util {
private static NumberFormat f;
private static Map<Class,Byte> PRIMITIVE_TYPES=new HashMap<Class,Byte>(15);
private static final byte TYPE_NULL = 0;
private static final byte TYPE_STREAMABLE = 1;
private static final byte TYPE_SERIALIZABLE = 2;
private static final byte TYPE_BOOLEAN = 10;
private static final byte TYPE_BYTE = 11;
private static final byte TYPE_CHAR = 12;
private static final byte TYPE_DOUBLE = 13;
private static final byte TYPE_FLOAT = 14;
private static final byte TYPE_INT = 15;
private static final byte TYPE_LONG = 16;
private static final byte TYPE_SHORT = 17;
private static final byte TYPE_STRING = 18;
private static final byte TYPE_BYTEARRAY = 19;
// constants
public static final int MAX_PORT=65535; // highest port allocatable
static boolean resolve_dns=false;
private static short COUNTER=1;
private static Pattern METHOD_NAME_TO_ATTR_NAME_PATTERN=Pattern.compile("[A-Z]+");
private static Pattern ATTR_NAME_TO_METHOD_NAME_PATTERN=Pattern.compile("_.");
protected static int CCHM_INITIAL_CAPACITY=16;
protected static float CCHM_LOAD_FACTOR=0.75f;
protected static int CCHM_CONCURRENCY_LEVEL=16;
/**
* Global thread group to which all (most!) JGroups threads belong
*/
private static ThreadGroup GLOBAL_GROUP=new ThreadGroup("JGroups") {
public void uncaughtException(Thread t, Throwable e) {
LogFactory.getLog("org.jgroups").error("uncaught exception in " + t + " (thread group=" + GLOBAL_GROUP + " )", e);
final ThreadGroup tgParent = getParent();
if(tgParent != null) {
tgParent.uncaughtException(t,e);
}
}
};
public static ThreadGroup getGlobalThreadGroup() {
return GLOBAL_GROUP;
}
public static enum AddressScope {GLOBAL, SITE_LOCAL, LINK_LOCAL, LOOPBACK, NON_LOOPBACK};
private static StackType ip_stack_type=_getIpStackType();
static {
/* Trying to get value of resolve_dns. PropertyPermission not granted if
* running in an untrusted environment with JNLP */
try {
resolve_dns=Boolean.valueOf(System.getProperty("resolve.dns", "false")).booleanValue();
}
catch (SecurityException ex){
resolve_dns=false;
}
f=NumberFormat.getNumberInstance();
f.setGroupingUsed(false);
// f.setMinimumFractionDigits(2);
f.setMaximumFractionDigits(2);
PRIMITIVE_TYPES.put(Boolean.class, new Byte(TYPE_BOOLEAN));
PRIMITIVE_TYPES.put(Byte.class, new Byte(TYPE_BYTE));
PRIMITIVE_TYPES.put(Character.class, new Byte(TYPE_CHAR));
PRIMITIVE_TYPES.put(Double.class, new Byte(TYPE_DOUBLE));
PRIMITIVE_TYPES.put(Float.class, new Byte(TYPE_FLOAT));
PRIMITIVE_TYPES.put(Integer.class, new Byte(TYPE_INT));
PRIMITIVE_TYPES.put(Long.class, new Byte(TYPE_LONG));
PRIMITIVE_TYPES.put(Short.class, new Byte(TYPE_SHORT));
PRIMITIVE_TYPES.put(String.class, new Byte(TYPE_STRING));
PRIMITIVE_TYPES.put(byte[].class, new Byte(TYPE_BYTEARRAY));
if(ip_stack_type == StackType.Unknown)
ip_stack_type=StackType.IPv6;
try {
String cchm_initial_capacity=System.getProperty(Global.CCHM_INITIAL_CAPACITY);
if(cchm_initial_capacity != null)
CCHM_INITIAL_CAPACITY=Integer.valueOf(cchm_initial_capacity);
} catch(SecurityException ex) {}
try {
String cchm_load_factor=System.getProperty(Global.CCHM_LOAD_FACTOR);
if(cchm_load_factor != null)
CCHM_LOAD_FACTOR=Float.valueOf(cchm_load_factor);
} catch(SecurityException ex) {}
try {
String cchm_concurrency_level=System.getProperty(Global.CCHM_CONCURRENCY_LEVEL);
if(cchm_concurrency_level != null)
CCHM_CONCURRENCY_LEVEL=Integer.valueOf(cchm_concurrency_level);
} catch(SecurityException ex) {}
}
public static void assertTrue(boolean condition) {
assert condition;
}
public static void assertTrue(String message, boolean condition) {
if(message != null)
assert condition : message;
else
assert condition;
}
public static void assertFalse(boolean condition) {
assertFalse(null, condition);
}
public static void assertFalse(String message, boolean condition) {
if(message != null)
assert !condition : message;
else
assert !condition;
}
public static void assertEquals(String message, Object val1, Object val2) {
if(message != null) {
assert val1.equals(val2) : message;
}
else {
assert val1.equals(val2);
}
}
public static void assertEquals(Object val1, Object val2) {
assertEquals(null, val1, val2);
}
public static void assertNotNull(String message, Object val) {
if(message != null)
assert val != null : message;
else
assert val != null;
}
public static void assertNotNull(Object val) {
assertNotNull(null, val);
}
public static void assertNull(String message, Object val) {
if(message != null)
assert val == null : message;
else
assert val == null;
}
/**
* Blocks until all channels have the same view
* @param timeout How long to wait (max in ms)
* @param interval Check every interval ms
* @param channels The channels which should form the view. The expected view size is channels.length.
* Must be non-null
*/
public static void blockUntilViewsReceived(long timeout, long interval, Channel ... channels) throws TimeoutException {
final int expected_size=channels.length;
if(interval > timeout)
throw new IllegalArgumentException("interval needs to be smaller than timeout");
final long end_time=System.currentTimeMillis() + timeout;
while(System.currentTimeMillis() < end_time) {
boolean all_ok=true;
for(Channel ch: channels) {
View view=ch.getView();
if(view == null || view.size() != expected_size) {
all_ok=false;
break;
}
}
if(all_ok)
return;
Util.sleep(interval);
}
throw new TimeoutException();
}
public static void addFlush(Channel ch, FLUSH flush) {
if(ch == null || flush == null)
throw new IllegalArgumentException("ch and flush have to be non-null");
ProtocolStack stack=ch.getProtocolStack();
stack.insertProtocolAtTop(flush);
}
public static void setScope(Message msg, short scope) {
SCOPE.ScopeHeader hdr=SCOPE.ScopeHeader.createMessageHeader(scope);
msg.putHeader(Global.SCOPE_ID, hdr);
msg.setFlag(Message.SCOPED);
}
public static short getScope(Message msg) {
SCOPE.ScopeHeader hdr=(SCOPE.ScopeHeader)msg.getHeader(Global.SCOPE_ID);
return hdr != null? hdr.getScope() : 0;
}
public static SCOPE.ScopeHeader getScopeHeader(Message msg) {
return (SCOPE.ScopeHeader)msg.getHeader(Global.SCOPE_ID);
}
/**
* Utility method. If the dest address is IPv6, convert scoped link-local addrs into unscoped ones
* @param sock
* @param dest
* @param sock_conn_timeout
* @throws IOException
*/
public static void connect(Socket sock, SocketAddress dest, int sock_conn_timeout) throws IOException {
if(dest instanceof InetSocketAddress) {
InetAddress addr=((InetSocketAddress)dest).getAddress();
if(addr instanceof Inet6Address) {
Inet6Address tmp=(Inet6Address)addr;
if(tmp.getScopeId() != 0) {
dest=new InetSocketAddress(InetAddress.getByAddress(tmp.getAddress()), ((InetSocketAddress)dest).getPort());
}
}
}
sock.connect(dest, sock_conn_timeout);
}
public static void close(InputStream inp) {
if(inp != null)
try {inp.close();} catch(IOException e) {}
}
public static void close(OutputStream out) {
if(out != null) {
try {out.close();} catch(IOException e) {}
}
}
public static void close(Socket s) {
if(s != null) {
try {s.close();} catch(Exception ex) {}
}
}
public static void close(ServerSocket s) {
if(s != null) {
try {s.close();} catch(Exception ex) {}
}
}
public static void close(DatagramSocket my_sock) {
if(my_sock != null) {
try {my_sock.close();} catch(Throwable t) {}
}
}
public static void close(Channel ch) {
if(ch != null) {
try {ch.close();} catch(Throwable t) {}
}
}
public static void close(Channel ... channels) {
if(channels != null) {
for(Channel ch: channels)
Util.close(ch);
}
}
public static void close(Connection conn) {
if(conn != null) {
try {conn.close();} catch(Throwable t) {}
}
}
/** Drops messages to/from other members and then closes the channel. Note that this member won't get excluded from
* the view until failure detection has kicked in and the new coord installed the new view */
public static void shutdown(Channel ch) throws Exception {
DISCARD discard=new DISCARD();
discard.setLocalAddress(ch.getAddress());
discard.setDiscardAll(true);
ProtocolStack stack=ch.getProtocolStack();
TP transport=stack.getTransport();
stack.insertProtocol(discard, ProtocolStack.ABOVE, transport.getClass());
//abruptly shutdown FD_SOCK just as in real life when member gets killed non gracefully
FD_SOCK fd = (FD_SOCK) ch.getProtocolStack().findProtocol("FD_SOCK");
if(fd != null)
fd.stopServerSocket(false);
View view=ch.getView();
if (view != null) {
ViewId vid = view.getViewId();
List<Address> members = Arrays.asList(ch.getAddress());
ViewId new_vid = new ViewId(ch.getAddress(), vid.getId() + 1);
View new_view = new View(new_vid, members);
// inject view in which the shut down member is the only element
GMS gms = (GMS) stack.findProtocol(GMS.class);
gms.installView(new_view);
}
Util.close(ch);
}
public static byte setFlag(byte bits, byte flag) {
return bits |= flag;
}
public static boolean isFlagSet(byte bits, byte flag) {
return (bits & flag) == flag;
}
public static byte clearFlags(byte bits, byte flag) {
return bits &= ~flag;
}
/**
* Creates an object from a byte buffer
*/
public static Object objectFromByteBuffer(byte[] buffer) throws Exception {
if(buffer == null) return null;
return objectFromByteBuffer(buffer, 0, buffer.length);
}
public static Object objectFromByteBuffer(byte[] buffer, int offset, int length) throws Exception {
if(buffer == null) return null;
Object retval=null;
byte type=buffer[offset];
switch(type) {
case TYPE_NULL:
return null;
case TYPE_STREAMABLE:
ByteArrayInputStream in_stream=new ExposedByteArrayInputStream(buffer, offset+1, length-1);
InputStream in=new DataInputStream(in_stream);
retval=readGenericStreamable((DataInputStream)in);
break;
case TYPE_SERIALIZABLE: // the object is Externalizable or Serializable
in_stream=new ExposedByteArrayInputStream(buffer, offset+1, length-1);
in=new ObjectInputStream(in_stream); // changed Nov 29 2004 (bela)
try {
retval=((ObjectInputStream)in).readObject();
}
finally {
Util.close(in);
}
break;
case TYPE_BOOLEAN:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).get() == 1;
case TYPE_BYTE:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).get();
case TYPE_CHAR:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getChar();
case TYPE_DOUBLE:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getDouble();
case TYPE_FLOAT:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getFloat();
case TYPE_INT:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getInt();
case TYPE_LONG:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getLong();
case TYPE_SHORT:
return ByteBuffer.wrap(buffer, offset + 1, length - 1).getShort();
case TYPE_STRING:
byte[] tmp=new byte[length -1];
System.arraycopy(buffer, offset +1, tmp, 0, length -1);
return new String(tmp);
case TYPE_BYTEARRAY:
tmp=new byte[length -1];
System.arraycopy(buffer, offset +1, tmp, 0, length -1);
return tmp;
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
return retval;
}
/**
* Serializes/Streams an object into a byte buffer.
* The object has to implement interface Serializable or Externalizable or Streamable.
*/
public static byte[] objectToByteBuffer(Object obj) throws Exception {
if(obj == null)
return ByteBuffer.allocate(Global.BYTE_SIZE).put(TYPE_NULL).array();
if(obj instanceof Streamable) {
final ExposedByteArrayOutputStream out_stream=new ExposedByteArrayOutputStream(128);
final ExposedDataOutputStream out=new ExposedDataOutputStream(out_stream);
out_stream.write(TYPE_STREAMABLE);
writeGenericStreamable((Streamable)obj, out);
return out_stream.toByteArray();
}
Byte type=PRIMITIVE_TYPES.get(obj.getClass());
if(type == null) { // will throw an exception if object is not serializable
final ExposedByteArrayOutputStream out_stream=new ExposedByteArrayOutputStream(128);
out_stream.write(TYPE_SERIALIZABLE);
ObjectOutputStream out=new ObjectOutputStream(out_stream);
out.writeObject(obj);
out.close();
return out_stream.toByteArray();
}
switch(type.byteValue()) {
case TYPE_BOOLEAN:
return ByteBuffer.allocate(Global.BYTE_SIZE * 2).put(TYPE_BOOLEAN)
.put(((Boolean)obj).booleanValue()? (byte)1 : (byte)0).array();
case TYPE_BYTE:
return ByteBuffer.allocate(Global.BYTE_SIZE *2).put(TYPE_BYTE).put(((Byte)obj).byteValue()).array();
case TYPE_CHAR:
return ByteBuffer.allocate(Global.BYTE_SIZE *3).put(TYPE_CHAR).putChar(((Character)obj).charValue()).array();
case TYPE_DOUBLE:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.DOUBLE_SIZE).put(TYPE_DOUBLE)
.putDouble(((Double)obj).doubleValue()).array();
case TYPE_FLOAT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.FLOAT_SIZE).put(TYPE_FLOAT)
.putFloat(((Float)obj).floatValue()).array();
case TYPE_INT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.INT_SIZE).put(TYPE_INT)
.putInt(((Integer)obj).intValue()).array();
case TYPE_LONG:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.LONG_SIZE).put(TYPE_LONG)
.putLong(((Long)obj).longValue()).array();
case TYPE_SHORT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.SHORT_SIZE).put(TYPE_SHORT)
.putShort(((Short)obj).shortValue()).array();
case TYPE_STRING:
String str=(String)obj;
byte[] buf=new byte[str.length()];
for(int i=0; i < buf.length; i++)
buf[i]=(byte)str.charAt(i);
return ByteBuffer.allocate(Global.BYTE_SIZE + buf.length).put(TYPE_STRING).put(buf, 0, buf.length).array();
case TYPE_BYTEARRAY:
buf=(byte[])obj;
return ByteBuffer.allocate(Global.BYTE_SIZE + buf.length).put(TYPE_BYTEARRAY)
.put(buf, 0, buf.length).array();
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
}
/* public static Buffer objectToBuffer(Object obj) throws Exception {
final ExposedByteArrayOutputStream out_stream=new ExposedByteArrayOutputStream(512);
if(obj == null) {
out_stream.write(TYPE_NULL);
out_stream.flush();
return out_stream.getBuffer();
}
OutputStream out=null;
Byte type;
try {
if(obj instanceof Streamable) { // use Streamable if we can
out_stream.write(TYPE_STREAMABLE);
out=new ExposedDataOutputStream(out_stream);
writeGenericStreamable((Streamable)obj, (DataOutputStream)out);
}
else if((type=PRIMITIVE_TYPES.get(obj.getClass())) != null) {
out_stream.write(type.byteValue());
out=new ExposedDataOutputStream(out_stream);
switch(type.byteValue()) {
case TYPE_BOOLEAN:
((DataOutputStream)out).writeBoolean(((Boolean)obj).booleanValue());
break;
case TYPE_BYTE:
((DataOutputStream)out).writeByte(((Byte)obj).byteValue());
break;
case TYPE_CHAR:
((DataOutputStream)out).writeChar(((Character)obj).charValue());
break;
case TYPE_DOUBLE:
((DataOutputStream)out).writeDouble(((Double)obj).doubleValue());
break;
case TYPE_FLOAT:
((DataOutputStream)out).writeFloat(((Float)obj).floatValue());
break;
case TYPE_INT:
((DataOutputStream)out).writeInt(((Integer)obj).intValue());
break;
case TYPE_LONG:
((DataOutputStream)out).writeLong(((Long)obj).longValue());
break;
case TYPE_SHORT:
((DataOutputStream)out).writeShort(((Short)obj).shortValue());
break;
case TYPE_STRING:
String str=(String)obj;
if(str.length() > Short.MAX_VALUE) {
((DataOutputStream)out).writeBoolean(true);
ObjectOutputStream oos=new ObjectOutputStream(out);
try {
oos.writeObject(str);
}
finally {
oos.close();
}
}
else {
((DataOutputStream)out).writeBoolean(false);
((DataOutputStream)out).writeUTF(str);
}
break;
case TYPE_BYTEARRAY:
byte[] buf=(byte[])obj;
((DataOutputStream)out).writeInt(buf.length);
out.write(buf, 0, buf.length);
break;
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
}
else { // will throw an exception if object is not serializable
out_stream.write(TYPE_SERIALIZABLE);
out=new ObjectOutputStream(out_stream);
((ObjectOutputStream)out).writeObject(obj);
}
}
finally {
Util.close(out);
}
return out_stream.getBuffer();
}*/
public static void objectToStream(Object obj, DataOutputStream out) throws Exception {
if(obj == null) {
out.write(TYPE_NULL);
return;
}
Byte type;
try {
if(obj instanceof Streamable) { // use Streamable if we can
out.write(TYPE_STREAMABLE);
writeGenericStreamable((Streamable)obj, out);
}
else if((type=PRIMITIVE_TYPES.get(obj.getClass())) != null) {
out.write(type.byteValue());
switch(type.byteValue()) {
case TYPE_BOOLEAN:
out.writeBoolean(((Boolean)obj).booleanValue());
break;
case TYPE_BYTE:
out.writeByte(((Byte)obj).byteValue());
break;
case TYPE_CHAR:
out.writeChar(((Character)obj).charValue());
break;
case TYPE_DOUBLE:
out.writeDouble(((Double)obj).doubleValue());
break;
case TYPE_FLOAT:
out.writeFloat(((Float)obj).floatValue());
break;
case TYPE_INT:
out.writeInt(((Integer)obj).intValue());
break;
case TYPE_LONG:
out.writeLong(((Long)obj).longValue());
break;
case TYPE_SHORT:
out.writeShort(((Short)obj).shortValue());
break;
case TYPE_STRING:
String str=(String)obj;
if(str.length() > Short.MAX_VALUE) {
out.writeBoolean(true);
ObjectOutputStream oos=new ObjectOutputStream(out);
try {
oos.writeObject(str);
}
finally {
oos.close();
}
}
else {
out.writeBoolean(false);
out.writeUTF(str);
}
break;
case TYPE_BYTEARRAY:
byte[] buf=(byte[])obj;
out.writeInt(buf.length);
out.write(buf, 0, buf.length);
break;
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
}
else { // will throw an exception if object is not serializable
out.write(TYPE_SERIALIZABLE);
ObjectOutputStream tmp=new ObjectOutputStream(out);
tmp.writeObject(obj);
}
}
finally {
Util.close(out);
}
}
public static Object objectFromStream(DataInputStream in) throws Exception {
if(in == null) return null;
Object retval=null;
byte b=(byte)in.read();
switch(b) {
case TYPE_NULL:
return null;
case TYPE_STREAMABLE:
retval=readGenericStreamable(in);
break;
case TYPE_SERIALIZABLE: // the object is Externalizable or Serializable
ObjectInputStream tmp=new ObjectInputStream(in);
retval=tmp.readObject();
break;
case TYPE_BOOLEAN:
retval=Boolean.valueOf(in.readBoolean());
break;
case TYPE_BYTE:
retval=Byte.valueOf(in.readByte());
break;
case TYPE_CHAR:
retval=Character.valueOf(in.readChar());
break;
case TYPE_DOUBLE:
retval=Double.valueOf(in.readDouble());
break;
case TYPE_FLOAT:
retval=Float.valueOf(in.readFloat());
break;
case TYPE_INT:
retval=Integer.valueOf(in.readInt());
break;
case TYPE_LONG:
retval=Long.valueOf(in.readLong());
break;
case TYPE_SHORT:
retval=Short.valueOf(in.readShort());
break;
case TYPE_STRING:
if(in.readBoolean()) { // large string
ObjectInputStream ois=new ObjectInputStream(in);
try {
retval=ois.readObject();
}
finally {
ois.close();
}
}
else {
retval=in.readUTF();
}
break;
case TYPE_BYTEARRAY:
int len=in.readInt();
byte[] tmpbuf=new byte[len];
in.readFully(tmpbuf, 0, tmpbuf.length);
retval=tmpbuf;
break;
default:
throw new IllegalArgumentException("type " + b + " is invalid");
}
return retval;
}
public static Streamable streamableFromByteBuffer(Class cl, byte[] buffer) throws Exception {
if(buffer == null) return null;
Streamable retval=null;
ByteArrayInputStream in_stream=new ExposedByteArrayInputStream(buffer);
DataInputStream in=new DataInputStream(in_stream); // changed Nov 29 2004 (bela)
retval=(Streamable)cl.newInstance();
retval.readFrom(in);
in.close();
return retval;
}
public static Streamable streamableFromByteBuffer(Class cl, byte[] buffer, int offset, int length) throws Exception {
if(buffer == null) return null;
Streamable retval=null;
ByteArrayInputStream in_stream=new ExposedByteArrayInputStream(buffer, offset, length);
DataInputStream in=new DataInputStream(in_stream); // changed Nov 29 2004 (bela)
retval=(Streamable)cl.newInstance();
retval.readFrom(in);
in.close();
return retval;
}
public static byte[] streamableToByteBuffer(Streamable obj) throws Exception {
byte[] result=null;
final ByteArrayOutputStream out_stream=new ExposedByteArrayOutputStream(512);
DataOutputStream out=new ExposedDataOutputStream(out_stream);
obj.writeTo(out);
result=out_stream.toByteArray();
out.close();
return result;
}
public static byte[] collectionToByteBuffer(Collection<Address> c) throws Exception {
byte[] result=null;
final ByteArrayOutputStream out_stream=new ExposedByteArrayOutputStream(512);
DataOutputStream out=new ExposedDataOutputStream(out_stream);
Util.writeAddresses(c, out);
result=out_stream.toByteArray();
out.close();
return result;
}
public static void writeAuthToken(AuthToken token, DataOutputStream out) throws IOException{
Util.writeString(token.getName(), out);
token.writeTo(out);
}
public static AuthToken readAuthToken(DataInputStream in) throws IOException, IllegalAccessException, InstantiationException {
try{
String type = Util.readString(in);
Object obj = Class.forName(type).newInstance();
AuthToken token = (AuthToken) obj;
token.readFrom(in);
return token;
}
catch(ClassNotFoundException cnfe){
return null;
}
}
public static void writeView(View view, DataOutputStream out) throws IOException {
if(view == null) {
out.writeBoolean(false);
return;
}
out.writeBoolean(true);
out.writeBoolean(view instanceof MergeView);
view.writeTo(out);
}
public static View readView(DataInputStream in) throws IOException, InstantiationException, IllegalAccessException {
if(in.readBoolean() == false)
return null;
boolean isMergeView=in.readBoolean();
View view;
if(isMergeView)
view=new MergeView();
else
view=new View();
view.readFrom(in);
return view;
}
public static void writeAddress(Address addr, DataOutputStream out) throws IOException {
byte flags=0;
boolean streamable_addr=true;
if(addr == null) {
flags=Util.setFlag(flags, Address.NULL);
out.writeByte(flags);
return;
}
if(addr instanceof UUID) {
flags=Util.setFlag(flags, Address.UUID_ADDR);
}
else if(addr instanceof IpAddress) {
flags=Util.setFlag(flags, Address.IP_ADDR);
}
else if(addr instanceof ProxyAddress) {
flags=Util.setFlag(flags, Address.PROXY_ADDR);
}
else {
streamable_addr=false;
}
out.writeByte(flags);
if(streamable_addr)
addr.writeTo(out);
else
writeOtherAddress(addr, out);
}
public static Address readAddress(DataInputStream in) throws IOException, IllegalAccessException, InstantiationException {
byte flags=in.readByte();
if(Util.isFlagSet(flags, Address.NULL))
return null;
Address addr;
if(Util.isFlagSet(flags, Address.UUID_ADDR)) {
addr=new UUID();
addr.readFrom(in);
}
else if(Util.isFlagSet(flags, Address.IP_ADDR)) {
addr=new IpAddress();
addr.readFrom(in);
}
else if(Util.isFlagSet(flags, Address.PROXY_ADDR)) {
addr=new ProxyAddress();
addr.readFrom(in);
}
else {
addr=readOtherAddress(in);
}
return addr;
}
public static int size(Address addr) {
int retval=Global.BYTE_SIZE; // flags
if(addr != null) {
if(addr instanceof UUID || addr instanceof IpAddress || addr instanceof ProxyAddress)
retval+=addr.size();
else {
retval+=Global.SHORT_SIZE; // magic number
retval+=addr.size();
}
}
return retval;
}
public static int size(View view) {
int retval=Global.BYTE_SIZE; // presence
if(view != null)
retval+=view.serializedSize() + Global.BYTE_SIZE; // merge view or regular view
return retval;
}
private static Address readOtherAddress(DataInputStream in) throws IOException, IllegalAccessException, InstantiationException {
short magic_number=in.readShort();
Class cl=ClassConfigurator.get(magic_number);
if(cl == null)
throw new RuntimeException("class for magic number " + magic_number + " not found");
Address addr=(Address)cl.newInstance();
addr.readFrom(in);
return addr;
}
private static void writeOtherAddress(Address addr, DataOutputStream out) throws IOException {
short magic_number=ClassConfigurator.getMagicNumber(addr.getClass());
// write the class info
if(magic_number == -1)
throw new RuntimeException("magic number " + magic_number + " not found");
out.writeShort(magic_number);
addr.writeTo(out);
}
/**
* Writes a Vector of Addresses. Can contain 65K addresses at most
* @param v A Collection<Address>
* @param out
* @throws IOException
*/
public static void writeAddresses(Collection<? extends Address> v, DataOutputStream out) throws IOException {
if(v == null) {
out.writeShort(-1);
return;
}
out.writeShort(v.size());
for(Address addr: v) {
Util.writeAddress(addr, out);
}
}
/**
*
* @param in
* @param cl The type of Collection, e.g. Vector.class
* @return Collection of Address objects
* @throws IOException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public static Collection<? extends Address> readAddresses(DataInputStream in, Class cl) throws IOException, IllegalAccessException, InstantiationException {
short length=in.readShort();
if(length < 0) return null;
Collection<Address> retval=(Collection<Address>)cl.newInstance();
Address addr;
for(int i=0; i < length; i++) {
addr=Util.readAddress(in);
retval.add(addr);
}
return retval;
}
/**
* Returns the marshalled size of a Collection of Addresses.
* <em>Assumes elements are of the same type !</em>
* @param addrs Collection<Address>
* @return long size
*/
public static long size(Collection<? extends Address> addrs) {
int retval=Global.SHORT_SIZE; // number of elements
if(addrs != null && !addrs.isEmpty()) {
Address addr=addrs.iterator().next();
retval+=size(addr) * addrs.size();
}
return retval;
}
public static void writeStreamable(Streamable obj, DataOutputStream out) throws IOException {
if(obj == null) {
out.writeBoolean(false);
return;
}
out.writeBoolean(true);
obj.writeTo(out);
}
public static Streamable readStreamable(Class clazz, DataInputStream in) throws IOException, IllegalAccessException, InstantiationException {
Streamable retval=null;
if(in.readBoolean() == false)
return null;
retval=(Streamable)clazz.newInstance();
retval.readFrom(in);
return retval;
}
public static void writeGenericStreamable(Streamable obj, DataOutputStream out) throws IOException {
short magic_number;
String classname;
if(obj == null) {
out.write(0);
return;
}