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108 changes: 108 additions & 0 deletions
108
liquibase-core/src/main/java/liquibase/osgi/Activator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package liquibase.osgi; | ||
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| import java.util.Arrays; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.concurrent.CopyOnWriteArrayList; | ||
| import liquibase.osgi.Activator.LiquibaseBundle; | ||
| import org.osgi.framework.Bundle; | ||
| import org.osgi.framework.BundleActivator; | ||
| import org.osgi.framework.BundleContext; | ||
| import org.osgi.framework.BundleEvent; | ||
| import org.osgi.util.tracker.BundleTracker; | ||
| import org.osgi.util.tracker.BundleTrackerCustomizer; | ||
|
|
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| public class Activator implements BundleActivator, BundleTrackerCustomizer<LiquibaseBundle> { | ||
|
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| private static final String LIQUIBASE_CUSTOM_CHANGE_WRAPPER_PACKAGES = "Liquibase-Custom-Change-Packages"; | ||
| private BundleTracker<LiquibaseBundle> bundleTracker; | ||
| private static final List<LiquibaseBundle> liquibaseBundles = new CopyOnWriteArrayList<>(); | ||
|
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| @Override | ||
| public void start(final BundleContext bc) throws Exception { | ||
| OSGIContainerChecker.osgiPlatform(); | ||
| bundleTracker = new BundleTracker<>(bc, Bundle.ACTIVE, this); | ||
| bundleTracker.open(); | ||
| } | ||
|
|
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| @Override | ||
| public void stop(BundleContext context) throws Exception { | ||
| bundleTracker.close(); | ||
| liquibaseBundles.clear(); | ||
| } | ||
|
|
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| public static List<LiquibaseBundle> getLiquibaseBundles() { | ||
| return Collections.unmodifiableList(liquibaseBundles); | ||
| } | ||
|
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| @Override | ||
| public LiquibaseBundle addingBundle(Bundle bundle, BundleEvent event) { | ||
| if (bundle.getBundleId() == 0) { | ||
| return null; | ||
| } | ||
| String customWrapperPackages = (String) bundle.getHeaders().get(LIQUIBASE_CUSTOM_CHANGE_WRAPPER_PACKAGES); | ||
| if (customWrapperPackages != null) { | ||
| LiquibaseBundle lb = new LiquibaseBundle(bundle, customWrapperPackages); | ||
| liquibaseBundles.add(lb); | ||
| return lb; | ||
| } | ||
| return null; | ||
| } | ||
|
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| @Override | ||
| public void modifiedBundle(Bundle bundle, BundleEvent event, LiquibaseBundle liquibaseBundle) { | ||
| // nothing to do | ||
| } | ||
|
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| @Override | ||
| public void removedBundle(Bundle bundle, BundleEvent event, LiquibaseBundle liquibaseBundle) { | ||
| if (liquibaseBundle != null) { | ||
| liquibaseBundles.remove(liquibaseBundle); | ||
| } | ||
| } | ||
|
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| public static class LiquibaseBundle { | ||
|
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| private final Bundle bundle; | ||
| private final List<String> allowedPackages; | ||
|
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| public LiquibaseBundle(Bundle bundle, String allowedPackages) { | ||
| if (bundle == null) { | ||
| throw new IllegalArgumentException("bundle cannot be empty"); | ||
| } | ||
| if (allowedPackages == null || allowedPackages.isEmpty()) { | ||
| throw new IllegalArgumentException("packages cannot be empty"); | ||
| } | ||
| this.bundle = bundle; | ||
| this.allowedPackages = Collections.unmodifiableList(Arrays.asList(allowedPackages.split(","))); | ||
| } | ||
|
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| public Bundle getBundle() { | ||
| return bundle; | ||
| } | ||
|
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| public boolean allowedAllPackages() { | ||
| return allowedPackages.size() == 1 | ||
| && "*".equals(allowedPackages.get(0)); | ||
| } | ||
|
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| public List<String> getAllowedPackages() { | ||
| return allowedPackages; | ||
| } | ||
|
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| } | ||
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| public static class OSGIContainerChecker { | ||
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| private static volatile boolean osgiPlatform = false; | ||
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| public static boolean isOsgiPlatform() { | ||
| return osgiPlatform; | ||
| } | ||
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| static void osgiPlatform() { | ||
| osgiPlatform = true; | ||
| } | ||
| } | ||
|
|
||
| } |
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