akquinet - Leading Provider of Digital Transformation Solutions

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akquinet AG
akquinet !1300k SE
business consulting
GmbH !60k SE

International Microsoft / .NET Outsourcing JAVA / SAP
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IBS dynamic solutions outsourcing it-agile
GmbH !250k SE GmbH !300k SE gGmbH !250k SE GmbH !100k SE
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IBS Brüssel SLS logistics system integration tech@spree
GmbH !40k SE GmbH !250k SE GmbH !125k SE GmbH !300k SE
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eurosoft Sp. z o.o. enterprise solutions
!100k SE GmbH !80k SE
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GmbH !75k SE

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the VM be restarted
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void start(BundleContext context) throws Exception;
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}

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public final static int RESOLVED = 0x00000020;
public final static int UNRESOLVED = 0x00000040;
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public interface PackageAdmin {
static final int BUNDLE_TYPE_FRAGMENT = 0x00000001;
Bundle getBundle(Class clazz);
Bundle[] getBundles(String symbolicName, String
versionRange);
int getBundleType(Bundle bundle);
ExportedPackage getExportedPackage(String name);
ExportedPackage[] getExportedPackages(Bundle bundle);
ExportedPackage[] getExportedPackages(String name);
Bundle[] getFragments(Bundle bundle);
RequiredBundle[] getRequiredBundles(String symbolicName);
Bundle[] getHosts(Bundle bundle);
void refreshPackages(Bundle[] bundles);
boolean resolveBundles(Bundle[] bundles);
}

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boolean resolveBundles(Bundle[] bundles);
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& package com.foo.hello;
public interface Hello {
& void sayHello(String name);
}

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& package com.foo.hello;
public interface Hello {
& void sayHello(String name);
}
&
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package com.foo.hello.impl;
import com.foo.hello;
public class HelloImpl implements Hello {
public void sayHello(String name) {
System.out.println("Hello " + name + "!");
}
}

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…
void addServiceListener(ServiceListener listener, String
filter)
throws InvalidSyntaxException;
void addServiceListener(ServiceListener listener);
void removeServiceListener(ServiceListener listener);
ServiceRegistration registerService(
String[] clazzes, Object service, Dictionary props);
String clazz, Object service, Dictionary props);
ServiceReference[] getServiceReferences(String clazz, String
filter)
ServiceReference getServiceReference(String clazz);
Object getService(ServiceReference reference);
boolean ungetService(ServiceReference reference);
}
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…
filter)
filter)
ServiceReference getServiceReference(Stringhave two methods
We clazz);
for publishing services
}
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import org.osgi.framework.*;
public class Activator implements BundleActivator {
private ServiceRegistration m_reg = null;
public void start(BundleContext context) {
m_reg = context.registerService(
com.foo.hello.Hello.class.getName(), new HelloImpl(),
null);
}

public void stop(BundleContext context) {
m_reg.unregister();
}
}

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null);
}

m_reg.unregister(); We register the service
} when starting, which makes
} it available to other
bundles

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null);
}

m_reg.unregister();
}
} We unregister it
when stopping

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Bundle-SymbolicName: com.foo.hello.impl
Export-Package: com.foo.hello
Import-Package: org.osgi.framework,
com.foo.hello
Bundle-Activator: com.foo.hello.impl.Activator

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…
filter)
filter)
}
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…
filter)
void removeServiceListener(ServiceListener We have methods to find
listener);
ServiceRegistration registerService( service references and get
String[] clazzes, Object service, Dictionary service objects
props);
filter)
}
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package com.foo.hello.client;
import com.foo.hello.Hello;
public class HelloClient implements BundleActivator {
ServiceReference ref = context.getServiceReference(
com.foo.hello.Hello.class.getName());
if (ref != null) {
Hello h = (Hello) context.getService(ref);
if (h != null) {
h.sayHello("World");
context.ungetService(h);
}
}
}
…
}

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if (ref != null) {
if (h != null) {
}
} We first get the
} service reference
…
}

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if (ref != null) {
if (h != null) {
}
}
} From the service
… reference we get the
}
service object

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akquinet - Leading Provider of Digital Transformation Solutions

akquinet - Leading Provider of Digital Transformation Solutions

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