L2NetworkExtensionPointEmitter.java

package org.zstack.network.l2;

import org.springframework.beans.factory.annotation.Autowired;
import org.zstack.core.componentloader.PluginRegistry;
import org.zstack.header.Component;
import org.zstack.header.network.l2.L2NetworkDeleteExtensionPoint;
import org.zstack.header.network.l2.L2NetworkException;
import org.zstack.header.network.l2.L2NetworkInventory;
import org.zstack.utils.CollectionUtils;
import org.zstack.utils.Utils;
import org.zstack.utils.function.ForEachFunction;
import org.zstack.utils.logging.CLogger;

import java.util.List;

public class L2NetworkExtensionPointEmitter implements Component {
    private static final CLogger logger = Utils.getLogger(L2NetworkExtensionPointEmitter.class);
    private List<L2NetworkDeleteExtensionPoint> extensions = null;
    
    @Autowired
    private PluginRegistry pluginRgty;

    public void preDelete(L2NetworkInventory inv) throws L2NetworkException {
        for (L2NetworkDeleteExtensionPoint ext : extensions) {
            try {
                ext.preDeleteL2Network(inv);
            } catch (L2NetworkException l2e) {
                throw l2e;
            } catch (Exception e) {
                logger.warn(String.format("Unhandled exception happened while calling L2NetworkDeleteExtensionPoint.preDeleteL2Network of %s", ext.getClass().getCanonicalName()), e);
            }
        }
    }
    
    public void beforeDelete(final L2NetworkInventory inv) {
        CollectionUtils.safeForEach(extensions, new ForEachFunction<L2NetworkDeleteExtensionPoint>() {
            @Override
            public void run(L2NetworkDeleteExtensionPoint arg) {
                arg.beforeDeleteL2Network(inv);
            }
        });
    }
    
    public void afterDelete(final L2NetworkInventory inv) {
        CollectionUtils.safeForEach(extensions, new ForEachFunction<L2NetworkDeleteExtensionPoint>() {
            @Override
            public void run(L2NetworkDeleteExtensionPoint arg) {
                arg.afterDeleteL2Network(inv);
            }
        });
    }

    @Override
    public boolean start() {
        populateExtensions();
        return true;
    }

    private void populateExtensions() {
        extensions  = pluginRgty.getExtensionList(L2NetworkDeleteExtensionPoint.class);
    }

    @Override
    public boolean stop() {
        return true;
    }
}