chesnokoff commented on code in PR #355:
URL: https://github.com/apache/ignite-extensions/pull/355#discussion_r3466749344
##########
modules/auto-activation-ext/src/main/java/opt/apache/ignite/activation/AutoActivationPluginProvider.java:
##########
@@ -0,0 +1,135 @@
+package opt.apache.ignite.activation;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.UUID;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCluster;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.cluster.ClusterState;
+import org.apache.ignite.lang.IgnitePredicate;
+import org.apache.ignite.plugin.CachePluginContext;
+import org.apache.ignite.plugin.CachePluginProvider;
+import org.apache.ignite.plugin.ExtensionRegistry;
+import org.apache.ignite.plugin.IgnitePlugin;
+import org.apache.ignite.plugin.PluginConfiguration;
+import org.apache.ignite.plugin.PluginContext;
+import org.apache.ignite.plugin.PluginProvider;
+import org.apache.ignite.plugin.PluginValidationException;
+
+/**
+ * Activate cluster when specified condition meet
+ */
+public class AutoActivationPluginProvider implements
PluginProvider<PluginConfiguration> {
+ /** */
+ private final IgnitePredicate<Collection<ClusterNode>> condition;
+
+ /** */
+ private IgniteLogger logger;
+
+ /** */
+ private Ignite grid;
+
+ /**
+ * @param condition Auto activation condition.
+ */
+ public
AutoActivationPluginProvider(IgnitePredicate<Collection<ClusterNode>>
condition) {
+ if (condition == null)
+ throw new IllegalArgumentException("Auto activation condition must
be set");
+
+ this.condition = condition;
+ }
+
+ /** {@inheritDoc} */
+ @Override public String name() {
+ return "Auto Activation Plugin";
+ }
+
+ /** {@inheritDoc} */
+ @Override public <T extends IgnitePlugin> T plugin() {
+ return (T)new IgnitePlugin() {
+ // No-op.
+ };
+ }
+
+ /** {@inheritDoc} */
+ @Override public String version() {
+ return "1.0";
+ }
+
+ /** {@inheritDoc} */
+ @Override public String copyright() {
+ return "";
+ }
+
+ /** {@inheritDoc} */
+ @Override public void initExtensions(PluginContext pc, ExtensionRegistry
er) {
+ logger = pc.log(this.getClass());
+ grid = pc.grid();
+ }
+
+ /** {@inheritDoc} */
+ @Override public <T> T createComponent(PluginContext pc, Class<T> type) {
+ return null;
+ }
+
+ /** {@inheritDoc} */
+ @Override public CachePluginProvider
createCacheProvider(CachePluginContext cpc) {
+ return null;
+ }
+
+ /** {@inheritDoc} */
+ @Override public void start(PluginContext pc) {
+ // do nothing
+ }
+
+ /** {@inheritDoc} */
+ @Override public void stop(boolean bln) {
+ // do nothing
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onIgniteStart() {
+
+ IgniteCluster cluster = grid.cluster();
+
+ if (cluster.state() == ClusterState.ACTIVE) {
+ if (logger.isInfoEnabled()) logger.info("Auto activation skipped -
cluster already activated");
+ return;
+ }
+
+ if (cluster.currentBaselineTopology() != null) {
+ if (logger.isInfoEnabled()) logger.info("Auto activation skipped -
baseline is not empty");
+ return;
+ }
+
+ if (condition.apply(cluster.nodes())) {
+ if (logger.isInfoEnabled()) logger.info("Auto activation plugin
set cluster state ACTIVE - activation condition meet");
+ cluster.state(ClusterState.ACTIVE);
+ }
+ else {
+ if (logger.isInfoEnabled()) logger.info("Auto activation skipped -
activation condition not meet");
+ }
+ }
+
+ /** {@inheritDoc} */
+ @Override public void onIgniteStop(boolean bln) {
+ // do nothing
+ }
+
+ /** {@inheritDoc} */
+ @Override public Serializable provideDiscoveryData(UUID uuid) {
+ return null;
+ }
+
+ /** {@inheritDoc} */
+ @Override public void receiveDiscoveryData(UUID uuid, Serializable srlzbl)
{
+ // do nothing
+ }
+
+ /** {@inheritDoc} */
+ @Override public void validateNewNode(ClusterNode cn) throws
PluginValidationException {
+ // do nothing
Review Comment:
```suggestion
// No-op.
```
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