config/src/main/java/org/apache/karaf/cellar/config/shell/DeleteCommand.java [47:72]:
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    @Reference
    private EventProducer eventProducer;

    @Override
    protected Object doExecute() throws Exception {
        // check if the group exists
        Group group = groupManager.findGroupByName(groupName);
        if (group == null) {
            System.err.println("Cluster group " + groupName + " doesn't exist");
            return null;
        }

        // check if the producer is ON
        if (eventProducer.getSwitch().getStatus().equals(SwitchStatus.OFF)) {
            System.err.println("Cluster event producer is OFF");
            return null;
        }

        // check if the config pid is allowed
        if (!isAllowed(group, Constants.CATEGORY, pid, EventType.OUTBOUND)) {
            System.err.println("Configuration PID " + pid + " is blocked outbound for cluster group " + groupName);
            return null;
        }

        Map<String, Properties> clusterConfigurations = clusterManager.getMap(Constants.CONFIGURATION_MAP + Configurations.SEPARATOR + groupName);
        if (clusterConfigurations != null) {
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config/src/main/java/org/apache/karaf/cellar/config/shell/PropAppendCommand.java [52:77]:
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    @Reference
    private EventProducer eventProducer;

    @Override
    protected Object doExecute() throws Exception {
        // check if the group exists
        Group group = groupManager.findGroupByName(groupName);
        if (group == null) {
            System.err.println("Cluster group " + groupName + " doesn't exist");
            return null;
        }

        // check if the producer is ON
        if (eventProducer.getSwitch().getStatus().equals(SwitchStatus.OFF)) {
            System.err.println("Cluster event producer is OFF");
            return null;
        }

        // check if the config pid is allowed
        if (!isAllowed(group, Constants.CATEGORY, pid, EventType.OUTBOUND)) {
            System.err.println("Configuration PID " + pid + " is blocked outbound for cluster group " + groupName);
            return null;
        }

        Map<String, Properties> clusterConfigurations = clusterManager.getMap(Constants.CONFIGURATION_MAP + Configurations.SEPARATOR + groupName);
        if (clusterConfigurations != null) {
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