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better formatting

This commit is contained in:
Doug MacEachern 2005-03-12 18:04:02 +00:00
parent cd7c0dd425
commit 68fcd5c586
1 changed files with 50 additions and 19 deletions
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69
bindings/java/src/net/hyperic/sigar/cmd/Netstat.java
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@ -2,6 +2,7 @@ package net.hyperic.sigar.cmd;
import java.net.InetAddress; import java.net.InetAddress;
import java.net.UnknownHostException; import java.net.UnknownHostException;
import java.util.ArrayList;
import net.hyperic.sigar.SigarException; import net.hyperic.sigar.SigarException;
import net.hyperic.sigar.NetConnection; import net.hyperic.sigar.NetConnection;
@ -13,14 +14,29 @@ import net.hyperic.sigar.NetPortMap;
*/ */
public class Netstat extends SigarCommandBase { public class Netstat extends SigarCommandBase {
private static final int LADDR_LEN = 20;
private static final int RADDR_LEN = 35;
private static final String OUTPUT_FORMAT =
"%-5s %-" + LADDR_LEN + "s %-" + RADDR_LEN + "s %s";
private static final String[] HEADER = new String[] {
"Proto",
"Local Address",
"Foreign Address",
"State"
};
private static boolean isNumeric; private static boolean isNumeric;
public Netstat(Shell shell) { public Netstat(Shell shell) {
super(shell); super(shell);
setOutputFormat(OUTPUT_FORMAT);
} }
public Netstat() { public Netstat() {
super(); super();
setOutputFormat(OUTPUT_FORMAT);
} }
protected boolean validateArgs(String[] args) { protected boolean validateArgs(String[] args) {
@ -93,21 +109,32 @@ public class Netstat extends SigarCommandBase {
return String.valueOf(port); return String.valueOf(port);
} }
private String formatAddress(String address) { private String formatAddress(String proto, String ip,
long portnum, int max) {
String port = formatPort(proto, portnum);
String address;
if (isNumeric) { if (isNumeric) {
return address; address = ip;
} }
if (address.equals("0.0.0.0")) { else if (ip.equals("0.0.0.0")) {
return "*"; address = "*";
}
else {
try {
address = InetAddress.getByName(ip).getHostName();
} catch (UnknownHostException e) {
address = ip;
}
} }
//advantage of InetAddress' lookup cache. max -= port.length() + 1;
try { if (address.length() > max) {
InetAddress addr = InetAddress.getByName(address); address = address.substring(0, max);
return addr.getHostName();
} catch (UnknownHostException e) {
return address;
} }
return address + ":" + port;
} }
//XXX currently weak sauce. should end up like netstat command. //XXX currently weak sauce. should end up like netstat command.
@ -120,7 +147,7 @@ public class Netstat extends SigarCommandBase {
} }
NetConnection[] connections = this.sigar.getNetConnectionList(flags); NetConnection[] connections = this.sigar.getNetConnectionList(flags);
println("Proto\tLocal Address\tForeign Address\tState"); printf(HEADER);
for (int i=0; i<connections.length; i++) { for (int i=0; i<connections.length; i++) {
NetConnection conn = connections[i]; NetConnection conn = connections[i];
@ -134,14 +161,18 @@ public class Netstat extends SigarCommandBase {
state = conn.getStateString(); state = conn.getStateString();
} }
println(proto + ArrayList items = new ArrayList();
"\t" + items.add(proto);
formatAddress(conn.getLocalAddress()) + ":" + items.add(formatAddress(proto,
formatPort(proto, conn.getLocalPort()) + conn.getLocalAddress(),
"\t" + conn.getLocalPort(),
formatAddress(conn.getRemoteAddress()) + ":" + LADDR_LEN));
formatPort(proto, conn.getRemotePort()) + "\t" + items.add(formatAddress(proto,
state); conn.getRemoteAddress(),
conn.getRemotePort(),
RADDR_LEN));
items.add(state);
printf(items);
} }
} }