diff options
Diffstat (limited to 'src/javax/jmdns/impl/tasks/resolver/ServiceInfoResolver.java')
| -rw-r--r-- | src/javax/jmdns/impl/tasks/resolver/ServiceInfoResolver.java | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/javax/jmdns/impl/tasks/resolver/ServiceInfoResolver.java b/src/javax/jmdns/impl/tasks/resolver/ServiceInfoResolver.java new file mode 100644 index 0000000..3147efd --- /dev/null +++ b/src/javax/jmdns/impl/tasks/resolver/ServiceInfoResolver.java @@ -0,0 +1,102 @@ +// Copyright 2003-2005 Arthur van Hoff, Rick Blair +// Licensed under Apache License version 2.0 +// Original license LGPL + +package javax.jmdns.impl.tasks.resolver; + +import java.io.IOException; + +import javax.jmdns.impl.DNSOutgoing; +import javax.jmdns.impl.DNSQuestion; +import javax.jmdns.impl.DNSRecord; +import javax.jmdns.impl.JmDNSImpl; +import javax.jmdns.impl.ServiceInfoImpl; +import javax.jmdns.impl.constants.DNSRecordClass; +import javax.jmdns.impl.constants.DNSRecordType; + +/** + * The ServiceInfoResolver queries up to three times consecutively for a service info, and then removes itself from the timer. + * <p/> + * The ServiceInfoResolver will run only if JmDNS is in state ANNOUNCED. REMIND: Prevent having multiple service resolvers for the same info in the timer queue. + */ +public class ServiceInfoResolver extends DNSResolverTask { + + private final ServiceInfoImpl _info; + + public ServiceInfoResolver(JmDNSImpl jmDNSImpl, ServiceInfoImpl info) { + super(jmDNSImpl); + this._info = info; + info.setDns(this.getDns()); + this.getDns().addListener(info, DNSQuestion.newQuestion(info.getQualifiedName(), DNSRecordType.TYPE_ANY, DNSRecordClass.CLASS_IN, DNSRecordClass.NOT_UNIQUE)); + } + + /* + * (non-Javadoc) + * @see javax.jmdns.impl.tasks.DNSTask#getName() + */ + @Override + public String getName() { + return "ServiceInfoResolver(" + (this.getDns() != null ? this.getDns().getName() : "") + ")"; + } + + /* + * (non-Javadoc) + * @see java.util.TimerTask#cancel() + */ + @Override + public boolean cancel() { + // We should not forget to remove the listener + boolean result = super.cancel(); + if (!_info.isPersistent()) { + this.getDns().removeListener(_info); + } + return result; + } + + /* + * (non-Javadoc) + * @see javax.jmdns.impl.tasks.Resolver#addAnswers(javax.jmdns.impl.DNSOutgoing) + */ + @Override + protected DNSOutgoing addAnswers(DNSOutgoing out) throws IOException { + DNSOutgoing newOut = out; + if (!_info.hasData()) { + long now = System.currentTimeMillis(); + newOut = this.addAnswer(newOut, (DNSRecord) this.getDns().getCache().getDNSEntry(_info.getQualifiedName(), DNSRecordType.TYPE_SRV, DNSRecordClass.CLASS_IN), now); + newOut = this.addAnswer(newOut, (DNSRecord) this.getDns().getCache().getDNSEntry(_info.getQualifiedName(), DNSRecordType.TYPE_TXT, DNSRecordClass.CLASS_IN), now); + if (_info.getServer().length() > 0) { + newOut = this.addAnswer(newOut, (DNSRecord) this.getDns().getCache().getDNSEntry(_info.getServer(), DNSRecordType.TYPE_A, DNSRecordClass.CLASS_IN), now); + newOut = this.addAnswer(newOut, (DNSRecord) this.getDns().getCache().getDNSEntry(_info.getServer(), DNSRecordType.TYPE_AAAA, DNSRecordClass.CLASS_IN), now); + } + } + return newOut; + } + + /* + * (non-Javadoc) + * @see javax.jmdns.impl.tasks.Resolver#addQuestions(javax.jmdns.impl.DNSOutgoing) + */ + @Override + protected DNSOutgoing addQuestions(DNSOutgoing out) throws IOException { + DNSOutgoing newOut = out; + if (!_info.hasData()) { + newOut = this.addQuestion(newOut, DNSQuestion.newQuestion(_info.getQualifiedName(), DNSRecordType.TYPE_SRV, DNSRecordClass.CLASS_IN, DNSRecordClass.NOT_UNIQUE)); + newOut = this.addQuestion(newOut, DNSQuestion.newQuestion(_info.getQualifiedName(), DNSRecordType.TYPE_TXT, DNSRecordClass.CLASS_IN, DNSRecordClass.NOT_UNIQUE)); + if (_info.getServer().length() > 0) { + newOut = this.addQuestion(newOut, DNSQuestion.newQuestion(_info.getServer(), DNSRecordType.TYPE_A, DNSRecordClass.CLASS_IN, DNSRecordClass.NOT_UNIQUE)); + newOut = this.addQuestion(newOut, DNSQuestion.newQuestion(_info.getServer(), DNSRecordType.TYPE_AAAA, DNSRecordClass.CLASS_IN, DNSRecordClass.NOT_UNIQUE)); + } + } + return newOut; + } + + /* + * (non-Javadoc) + * @see javax.jmdns.impl.tasks.Resolver#description() + */ + @Override + protected String description() { + return "querying service info: " + (_info != null ? _info.getQualifiedName() : "null"); + } + +}
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