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Code Issues Releases Wiki Activity

Move DNS resolving into connect()

Browse source 
It was misplaced in ConnectionConfiguration anyways, as the sole
instantiation of a ConnectionConfiguration should not cause any network
I/O.
This commit is contained in:
Florian Schmaus 2014-03-18 17:29:38 +01:00
parent dbab9b8995
commit d349940537
7 changed files with 56 additions and 64 deletions
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19
core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
View file

@ -102,8 +102,6 @@ public class ConnectionConfiguration implements Cloneable {
* @param serviceName the name of the service provided by an XMPP server.
*/
public ConnectionConfiguration(String serviceName) {
// Perform DNS lookup to get host and port to use
hostAddresses = DNSUtil.resolveXMPPDomain(serviceName);
init(serviceName, ProxyInfo.forDefaultProxy());
}
@ -117,8 +115,6 @@ public class ConnectionConfiguration implements Cloneable {
* @param proxy the proxy through which XMPP is to be connected
*/
public ConnectionConfiguration(String serviceName,ProxyInfo proxy) {
// Perform DNS lookup to get host and port to use
hostAddresses = DNSUtil.resolveXMPPDomain(serviceName);
init(serviceName, proxy);
}
@ -203,7 +199,7 @@ public class ConnectionConfiguration implements Cloneable {
*
* @param serviceName the XMPP domain of the target server.
*/
public void setServiceName(String serviceName) {
void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
@ -569,14 +565,17 @@ public class ConnectionConfiguration implements Cloneable {
this.resource = resource;
}
void maybeResolveDns() throws Exception {
// Abort if we did already resolve the hosts successfully
if (hostAddresses != null)
return;
hostAddresses = DNSUtil.resolveXMPPDomain(serviceName);
}
private void initHostAddresses(String host, int port) {
hostAddresses = new ArrayList<HostAddress>(1);
HostAddress hostAddress;
try {
hostAddress = new HostAddress(host, port);
} catch (Exception e) {
throw new IllegalStateException(e);
}
hostAddress = new HostAddress(host, port);
hostAddresses.add(hostAddress);
}
}

8
core/src/main/java/org/jivesoftware/smack/util/DNSUtil.java
View file

@ -77,8 +77,9 @@ public class DNSUtil {
* @param domain the domain.
* @return List of HostAddress, which encompasses the hostname and port that the
* XMPP server can be reached at for the specified domain.
* @throws Exception
*/
public static List<HostAddress> resolveXMPPDomain(final String domain) {
public static List<HostAddress> resolveXMPPDomain(final String domain) throws Exception {
if (dnsResolver == null) {
List<HostAddress> addresses = new ArrayList<HostAddress>(1);
addresses.add(new HostAddress(domain, 5222));
@ -103,8 +104,9 @@ public class DNSUtil {
* @param domain the domain.
* @return List of HostAddress, which encompasses the hostname and port that the
* XMPP server can be reached at for the specified domain.
* @throws Exception
*/
public static List<HostAddress> resolveXMPPServerDomain(final String domain) {
public static List<HostAddress> resolveXMPPServerDomain(final String domain) throws Exception {
if (dnsResolver == null) {
List<HostAddress> addresses = new ArrayList<HostAddress>(1);
addresses.add(new HostAddress(domain, 5269));
@ -113,7 +115,7 @@ public class DNSUtil {
return resolveDomain(domain, 's');
}
private static List<HostAddress> resolveDomain(String domain, char keyPrefix) {
private static List<HostAddress> resolveDomain(String domain, char keyPrefix) throws Exception {
// Prefix the key with 's' to distinguish him from the client domain lookups
String key = keyPrefix + domain;
// Return item from cache if it exists.

2
core/src/main/java/org/jivesoftware/smack/util/dns/DNSResolver.java
View file

@ -29,6 +29,6 @@ public interface DNSResolver {
* @param name The symbolic name of the service.
* @return The list of SRV records mapped to the service name.
*/
List<SRVRecord> lookupSRVRecords(String name);
List<SRVRecord> lookupSRVRecords(String name) throws Exception;
}

2
core/src/main/java/org/jivesoftware/smack/util/dns/HostAddress.java
View file

@ -51,7 +51,7 @@ public class HostAddress {
this(fqdn);
if (port < 0 || port > 65535)
throw new IllegalArgumentException(
"DNS SRV records weight must be a 16-bit unsiged integer (i.e. between 0-65535. Port was: " + port);
"Port must be a 16-bit unsiged integer (i.e. between 0-65535. Port was: " + port);
this.port = port;
}

41
resolver-dnsjava/src/main/java/org/jivesoftware/smack/util/dns/DNSJavaResolver.java
View file

@ -1,6 +1,6 @@
/**
*
* Copyright 2013 Florian Schmaus
* Copyright 2013-2014 Florian Schmaus
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -21,6 +21,7 @@ import java.util.List;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.Record;
import org.xbill.DNS.TextParseException;
import org.xbill.DNS.Type;
/**
@ -39,35 +40,27 @@ public class DNSJavaResolver implements DNSResolver {
}
@Override
public List<SRVRecord> lookupSRVRecords(String name) {
public List<SRVRecord> lookupSRVRecords(String name) throws TextParseException {
List<SRVRecord> res = new ArrayList<SRVRecord>();
try {
Lookup lookup = new Lookup(name, Type.SRV);
Record recs[] = lookup.run();
if (recs == null)
return res;
Lookup lookup = new Lookup(name, Type.SRV);
Record recs[] = lookup.run();
if (recs == null)
return res;
for (Record record : recs) {
org.xbill.DNS.SRVRecord srvRecord = (org.xbill.DNS.SRVRecord) record;
if (srvRecord != null && srvRecord.getTarget() != null) {
String host = srvRecord.getTarget().toString();
int port = srvRecord.getPort();
int priority = srvRecord.getPriority();
int weight = srvRecord.getWeight();
for (Record record : recs) {
org.xbill.DNS.SRVRecord srvRecord = (org.xbill.DNS.SRVRecord) record;
if (srvRecord != null && srvRecord.getTarget() != null) {
String host = srvRecord.getTarget().toString();
int port = srvRecord.getPort();
int priority = srvRecord.getPriority();
int weight = srvRecord.getWeight();
SRVRecord r;
try {
r = new SRVRecord(host, port, priority, weight);
} catch (Exception e) {
continue;
}
res.add(r);
}
SRVRecord r = new SRVRecord(host, port, priority, weight);
res.add(r);
}
} catch (Exception e) {
}
return res;
}
}

42
resolver-javax/src/main/java/org/jivesoftware/smack/util/dns/JavaxResolver.java
View file

@ -1,6 +1,6 @@
/**
*
* Copyright 2013 Florian Schmaus
* Copyright 2013-2014 Florian Schmaus
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -21,6 +21,7 @@ import java.util.Hashtable;
import java.util.List;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
@ -68,32 +69,23 @@ public class JavaxResolver implements DNSResolver {
}
@Override
public List<SRVRecord> lookupSRVRecords(String name) {
public List<SRVRecord> lookupSRVRecords(String name) throws NamingException {
List<SRVRecord> res = new ArrayList<SRVRecord>();
try {
Attributes dnsLookup = dirContext.getAttributes(name, new String[]{"SRV"});
Attribute srvAttribute = dnsLookup.get("SRV");
@SuppressWarnings("unchecked")
NamingEnumeration<String> srvRecords = (NamingEnumeration<String>) srvAttribute.getAll();
while (srvRecords.hasMore()) {
String srvRecordString = srvRecords.next();
String[] srvRecordEntries = srvRecordString.split(" ");
int priority = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 4]);
int port = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 2]);
int weight = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 3]);
String host = srvRecordEntries[srvRecordEntries.length - 1];
SRVRecord srvRecord;
try {
srvRecord = new SRVRecord(host, port, priority, weight);
} catch (Exception e) {
continue;
}
res.add(srvRecord);
}
} catch (Exception e) {
Attributes dnsLookup = dirContext.getAttributes(name, new String[] { "SRV" });
Attribute srvAttribute = dnsLookup.get("SRV");
@SuppressWarnings("unchecked")
NamingEnumeration<String> srvRecords = (NamingEnumeration<String>) srvAttribute.getAll();
while (srvRecords.hasMore()) {
String srvRecordString = srvRecords.next();
String[] srvRecordEntries = srvRecordString.split(" ");
int priority = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 4]);
int port = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 2]);
int weight = Integer.parseInt(srvRecordEntries[srvRecordEntries.length - 3]);
String host = srvRecordEntries[srvRecordEntries.length - 1];
SRVRecord srvRecord = new SRVRecord(host, port, priority, weight);
res.add(srvRecord);
}
return res;
}

6
tcp/src/main/java/org/jivesoftware/smack/TCPConnection.java
View file

@ -420,6 +420,12 @@ public class TCPConnection extends XMPPConnection {
private void connectUsingConfiguration(ConnectionConfiguration config) throws SmackException, IOException {
Exception exception = null;
try {
config.maybeResolveDns();
}
catch (Exception e) {
throw new SmackException(e);
}
Iterator<HostAddress> it = config.getHostAddresses().iterator();
List<HostAddress> failedAddresses = new LinkedList<HostAddress>();
while (it.hasNext()) {