/
DemoProvisioner.java
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/
DemoProvisioner.java
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package org.coderthoughts.cloud.provisioning.demo.impl;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.TimeUnit;
import org.coderthoughts.cloud.framework.service.api.OSGiFramework;
import org.coderthoughts.cloud.provisioning.api.Base64;
import org.coderthoughts.cloud.provisioning.api.RemoteDeployer;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.Filter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
public class DemoProvisioner {
private static final String [] PROVIDER_BUNDLES = {"/cloud-disco-demo-api-1.0.0-SNAPSHOT.jar", "/cloud-disco-demo-provider-1.0.0-SNAPSHOT.jar"};
private final BundleContext bundleContext;
private ServiceTracker frameworkTracker;
private List<ServiceReference> frameworkReferences = new CopyOnWriteArrayList<ServiceReference>();
private List<ServiceReference> serviceProviderFrameworks = new CopyOnWriteArrayList<ServiceReference>();
private ServiceTracker remoteDeployerServiceTracker;
private boolean fixedDeploymentsDone;
DemoProvisioner(BundleContext context) {
bundleContext = context;
}
void start() {
try {
// This makes sure that RemoteDeployer service in other frameworks are looked up. It shouldn't really be needed
Filter filter = bundleContext.createFilter("(&(objectClass=" + RemoteDeployer.class.getName() + ")(service.imported=*))");
remoteDeployerServiceTracker = new ServiceTracker(bundleContext, filter, null) {
@Override
public Object addingService(ServiceReference reference) {
System.out.println("*** RemoteDeployer service found for framework: " + reference.getProperty("endpoint.framework.uuid"));
return super.addingService(reference);
}
};
remoteDeployerServiceTracker.open();
} catch (InvalidSyntaxException e) {
e.printStackTrace();
}
try {
Filter filter = bundleContext.createFilter("(&(objectClass=" +
OSGiFramework.class.getName() + ")(service.imported=*))");
frameworkTracker = new ServiceTracker(bundleContext, filter, null) {
@Override
public Object addingService(ServiceReference reference) {
handleFrameworkAdded(reference);
return super.addingService(reference);
}
@Override
public void removedService(ServiceReference reference, Object service) {
handleFrameworkRemoved(reference);
super.removedService(reference, service);
}
};
frameworkTracker.open();
} catch (InvalidSyntaxException e) {
e.printStackTrace();
}
}
private void handleFrameworkAdded(final ServiceReference reference) {
// Do this asynchronously
new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("*** Remote Framework Added: " + reference.getProperty("org.coderthoughts.framework.ip"));
frameworkReferences.add(reference);
if (isProviderFramework(reference))
serviceProviderFrameworks.add(reference);
handleTopologyChange();
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
private void handleFrameworkRemoved(final ServiceReference reference) {
// Do this asynchronously
new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("*** Remote Framework Removed: " + reference.getProperty("org.coderthoughts.framework.ip"));
frameworkReferences.remove(reference);
handleTopologyChange();
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
private boolean isProviderFramework(ServiceReference reference) {
// Check whether the service provider bundles have already been deployed to this framework
System.out.println("*** Reading framework state");
RemoteDeployer rd = getRemoteDeployer(reference);
for (String location : PROVIDER_BUNDLES) {
if (rd.getBundleID(location) == -1)
return false;
}
return true;
}
private void handleTopologyChange() {
handleFixedDeployments();
handleFloatingDeployments();
}
private void handleFixedDeployments() {
if (fixedDeploymentsDone)
return;
for (ServiceReference ref : frameworkReferences) {
if (isFixedFramework(ref)) {
System.out.println("*** Found fixed framework");
deployWebToFramework(ref);
fixedDeploymentsDone = true;
return;
}
}
}
private boolean isFixedFramework(ServiceReference ref) {
try {
String fixedFrameworkHost = "web-*";
Filter filter = bundleContext.createFilter("(org.coderthoughts.framework.ip=" + fixedFrameworkHost +")");
return filter.match(ref);
} catch (InvalidSyntaxException e) {
throw new RuntimeException(e);
}
}
private void deployWebToFramework(ServiceReference frameworkReference) {
RemoteDeployer rd = getRemoteDeployer(frameworkReference);
try {
deployBundles(rd, "/cloud-disco-demo-api-1.0.0-SNAPSHOT.jar", "/cloud-disco-demo-web-ui-1.0.0-SNAPSHOT.jar");
System.out.println("*** Fixed framework bundles deployed");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void handleFloatingDeployments() {
ArrayList<ServiceReference> spfs = new ArrayList<ServiceReference>(serviceProviderFrameworks);
for (ServiceReference ref : spfs) {
if (frameworkReferences.contains(ref)) {
// Already deployed, nothing to do
// TODO handle case where deployed to multiple frameworks
return;
} else {
// Framework has disappeared, remove from the list and redeploy elsewhere
serviceProviderFrameworks.remove(ref);
}
}
// Deploy to framework with largest amount of free memory
ServiceReference fwRef = getDynamicDeploymentFramework();
if (fwRef == null) {
System.out.println("*** No floating framework to deploy to found yet");
return;
}
System.out.println("*** Deploying to floating framework: " + fwRef);
deployServiceProviderToFramework(fwRef);
serviceProviderFrameworks.add(fwRef);
}
private void deployServiceProviderToFramework(ServiceReference frameworkReference) {
RemoteDeployer rd = getRemoteDeployer(frameworkReference);
try {
deployBundles(rd, PROVIDER_BUNDLES);
System.out.println("*** Service provider framework bundles deployed");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private ServiceReference getDynamicDeploymentFramework() {
SortedMap<Long, ServiceReference> frameworks = new TreeMap<Long, ServiceReference>();
for (ServiceReference ref : frameworkReferences) {
if (isFixedFramework(ref))
continue;
OSGiFramework fw = (OSGiFramework) bundleContext.getService(ref);
long mem = Long.parseLong(fw.getFrameworkVariable(OSGiFramework.FV_AVAILABLE_MEMORY));
while(frameworks.get(mem) != null) {
// in case there is another framework with exactly the same amount of memory available,
// just add 1 to get the next free key.
mem++;
}
frameworks.put(mem, ref);
}
if (frameworks.size() == 0)
return null;
Long highMem = frameworks.lastKey();
ServiceReference fwRef = frameworks.get(highMem);
System.out.println("*** Deploying provider service to framework with most memory: " +
fwRef.getProperty("org.coderthoughts.framework.ip") + "(" + highMem/1024l + " kb)");
return fwRef;
}
private void deployBundles(RemoteDeployer rd, String ... bundleURLs) throws IOException, BundleException {
List<Long> ids = new ArrayList<Long>();
for (String u : bundleURLs) {
if (rd.getBundleID(u) != -1) {
System.out.println("*** Bundle with location: " + u + " is already deployed. Not redeploying.");
continue;
}
URL url = getClass().getResource(u);
byte[] b64Data = Base64.encode(Streams.suck(url.openStream()));
ids.add(rd.installBundle(u, b64Data));
}
for (long id : ids) {
rd.startBundle(id);
}
}
private RemoteDeployer getRemoteDeployer(ServiceReference frameworkReference) {
int retries = 15;
Object fwkUUID = frameworkReference.getProperty("endpoint.framework.uuid");
if (fwkUUID == null)
throw new IllegalStateException("Framework UUID not found for framework: " + frameworkReference);
try {
int i=0;
while (i < retries) {
ServiceReference[] refs = bundleContext.getServiceReferences(RemoteDeployer.class.getName(), "(endpoint.framework.uuid=" + fwkUUID + ")");
if (refs != null && refs.length > 0)
return (RemoteDeployer) bundleContext.getService(refs[0]);
TimeUnit.SECONDS.sleep(1);
i++;
}
} catch (Exception e) {
throw new RuntimeException(e);
}
throw new IllegalStateException("Unable to find RemoteDeployer for framework: " + frameworkReference);
}
/*
protected void testDeployment(ServiceReference frameworkReference) {
RemoteDeployer rd = getRemoteDeployer(frameworkReference);
System.out.println("***** " + rd.getSymbolicName(1));
try {
deployBundles(rd);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
*/
void stop() {
frameworkTracker.close();
remoteDeployerServiceTracker.close();
}
}