Examples with PersistenceEvent org.openremote.container.persistence.PersistenceEvent used on opensource projects

Example 6 with PersistenceEvent

use of org.openremote.container.persistence.PersistenceEvent in project openremote by openremote.

the class AgentService method processAgentChange.

/**
 * Looks for new, modified and obsolete protocol configurations and links / unlinks any associated attributes
 */
protected void processAgentChange(Asset agent, PersistenceEvent persistenceEvent) {
    LOG.finest("Processing agent persistence event: " + persistenceEvent.getCause());
    switch(persistenceEvent.getCause()) {
        case INSERT:
            addReplaceAgent(agent);
            linkProtocolConfigurations(agent.getAttributesStream().filter(ProtocolConfiguration::isProtocolConfiguration));
            break;
        case UPDATE:
            addReplaceAgent(agent);
            // Check if any protocol config attributes have been added/removed or modified
            int attributesIndex = Arrays.asList(persistenceEvent.getPropertyNames()).indexOf("attributes");
            if (attributesIndex < 0) {
                return;
            }
            // Attributes have possibly changed so need to compare old and new state to determine
            // which protocol configs are affected
            List<AssetAttribute> oldProtocolConfigurations = attributesFromJson((ObjectValue) persistenceEvent.getPreviousState()[attributesIndex], agent.getId()).filter(ProtocolConfiguration::isProtocolConfiguration).collect(Collectors.toList());
            List<AssetAttribute> newProtocolConfigurations = attributesFromJson((ObjectValue) persistenceEvent.getCurrentState()[attributesIndex], agent.getId()).filter(ProtocolConfiguration::isProtocolConfiguration).collect(Collectors.toList());
            // Compare protocol configurations by JSON value
            // Unlink protocols that are in oldConfigs but not in newConfigs
            unlinkProtocolConfigurations(oldProtocolConfigurations.stream().filter(oldProtocolAttribute -> newProtocolConfigurations.stream().noneMatch(oldProtocolAttribute::equals)));
            // Link protocols that are in newConfigs but not in oldConfigs
            linkProtocolConfigurations(newProtocolConfigurations.stream().filter(newProtocolAttribute -> oldProtocolConfigurations.stream().noneMatch(newProtocolAttribute::equals)));
            break;
        case DELETE:
            removeAgent(agent);
            // Unlink any attributes that have an agent link to this agent
            unlinkProtocolConfigurations(agent.getAttributesStream().filter(ProtocolConfiguration::isProtocolConfiguration));
            break;
    }
}