mgao0 commented on code in PR #2149:
URL: https://github.com/apache/helix/pull/2149#discussion_r900417134
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/DefaultCloudEventCallbackImpl.java:
##########
@@ -19,51 +19,102 @@
* under the License.
*/
+import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* A default callback implementation class to be used in {@link
HelixCloudEventListener}
*/
public class DefaultCloudEventCallbackImpl {
+ private static final Logger LOG =
LoggerFactory.getLogger(DefaultCloudEventCallbackImpl.class);
+ private final String _instanceReason = "Cloud event in
DefaultCloudEventCallback at %s";
+ private final String _emmReason = "Cloud event EMM in
DefaultCloudEventCallback by %s at %s";
/**
- * Disable the instance
+ * Disable the instance and track the cloud event in map field
disabledInstancesWithInfo in
+ * cluster config. Will not re-disable the instance if the instance is
already disabled for
+ * other reason. (So we will not overwrite the disabled reason and enable
this instance when
+ * on-unpause)
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void disableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ LOG.info("DefaultCloudEventCallbackImpl disabled Instance {}",
manager.getInstanceName());
+ if (InstanceValidationUtil
+ .isEnabled(manager.getHelixDataAccessor(), manager.getInstanceName()))
{
+ manager.getClusterManagmentTool()
+ .enableInstance(manager.getClusterName(), manager.getInstanceName(),
false,
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message);
+ }
+
HelixEventHandlingUtil.updateCloudEventOperationInClusterConfig(manager.getClusterName(),
+ manager.getInstanceName(),
manager.getHelixDataAccessor().getBaseDataAccessor(), false,
+ message);
}
/**
* Enable the instance
+ * We only enable instance that is disabled because of cloud event.
Review Comment:
Nit: Let's add one sentence such as "CloudEvent recorded in cluster config
will always (regardless the instance disable reason) be cleaned up."
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/DefaultCloudEventCallbackImpl.java:
##########
@@ -19,51 +19,102 @@
* under the License.
*/
+import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* A default callback implementation class to be used in {@link
HelixCloudEventListener}
*/
public class DefaultCloudEventCallbackImpl {
+ private static final Logger LOG =
LoggerFactory.getLogger(DefaultCloudEventCallbackImpl.class);
+ private final String _instanceReason = "Cloud event in
DefaultCloudEventCallback at %s";
+ private final String _emmReason = "Cloud event EMM in
DefaultCloudEventCallback by %s at %s";
/**
- * Disable the instance
+ * Disable the instance and track the cloud event in map field
disabledInstancesWithInfo in
+ * cluster config. Will not re-disable the instance if the instance is
already disabled for
+ * other reason. (So we will not overwrite the disabled reason and enable
this instance when
+ * on-unpause)
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void disableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ LOG.info("DefaultCloudEventCallbackImpl disabled Instance {}",
manager.getInstanceName());
+ if (InstanceValidationUtil
+ .isEnabled(manager.getHelixDataAccessor(), manager.getInstanceName()))
{
+ manager.getClusterManagmentTool()
+ .enableInstance(manager.getClusterName(), manager.getInstanceName(),
false,
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message);
+ }
Review Comment:
Nit: Let's add one more logging here indicating disable complets.
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/DefaultCloudEventCallbackImpl.java:
##########
@@ -19,51 +19,102 @@
* under the License.
*/
+import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* A default callback implementation class to be used in {@link
HelixCloudEventListener}
*/
public class DefaultCloudEventCallbackImpl {
+ private static final Logger LOG =
LoggerFactory.getLogger(DefaultCloudEventCallbackImpl.class);
+ private final String _instanceReason = "Cloud event in
DefaultCloudEventCallback at %s";
+ private final String _emmReason = "Cloud event EMM in
DefaultCloudEventCallback by %s at %s";
/**
- * Disable the instance
+ * Disable the instance and track the cloud event in map field
disabledInstancesWithInfo in
+ * cluster config. Will not re-disable the instance if the instance is
already disabled for
+ * other reason. (So we will not overwrite the disabled reason and enable
this instance when
+ * on-unpause)
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void disableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ LOG.info("DefaultCloudEventCallbackImpl disabled Instance {}",
manager.getInstanceName());
+ if (InstanceValidationUtil
+ .isEnabled(manager.getHelixDataAccessor(), manager.getInstanceName()))
{
+ manager.getClusterManagmentTool()
+ .enableInstance(manager.getClusterName(), manager.getInstanceName(),
false,
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message);
+ }
+
HelixEventHandlingUtil.updateCloudEventOperationInClusterConfig(manager.getClusterName(),
+ manager.getInstanceName(),
manager.getHelixDataAccessor().getBaseDataAccessor(), false,
+ message);
}
/**
* Enable the instance
+ * We only enable instance that is disabled because of cloud event.
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void enableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ LOG.info("DefaultCloudEventCallbackImpl enable Instance {}",
manager.getInstanceName());
+ String instanceName = manager.getInstanceName();
+ HelixDataAccessor accessor = manager.getHelixDataAccessor();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ HelixEventHandlingUtil
+ .updateCloudEventOperationInClusterConfig(manager.getClusterName(),
instanceName,
+ manager.getHelixDataAccessor().getBaseDataAccessor(), true,
message);
+ if (HelixEventHandlingUtil.isInstanceDisabledForCloudEvent(instanceName,
accessor)) {
+
manager.getClusterManagmentTool().enableInstance(manager.getClusterName(),
instanceName, true,
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message);
+ }
}
/**
- *
+ * Will enter MM when the cluster is not in MM
+ * TODO: we should add maintenance reason when EMM with cloud event
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void enterMaintenanceMode(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ if
(!manager.getClusterManagmentTool().isInMaintenanceMode(manager.getClusterName()))
{
+ LOG.info("DefaultCloudEventCallbackImpl enterMaintenanceMode by {}",
+ manager.getInstanceName());
+ manager.getClusterManagmentTool()
+ .manuallyEnableMaintenanceMode(manager.getClusterName(), true,
+ String.format(_emmReason, manager.getInstanceName(),
System.currentTimeMillis()),
+ null);
+ }
}
/**
- *
+ * Will exit MM when when cluster config tracks no ongoing cloud event being
handling
+ * TODO: we should also check the maintenance reason and only exit when EMM
is caused by cloud event
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void exitMaintenanceMode(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ ClusterConfig clusterConfig = manager.getHelixDataAccessor()
+
.getProperty(manager.getHelixDataAccessor().keyBuilder().clusterConfig());
+ if (HelixEventHandlingUtil.checkNoInstanceUnderCloudEvent(clusterConfig)) {
+ LOG.info("DefaultCloudEventCallbackImpl exitMaintenanceMode by {}",
+ manager.getInstanceName());
+ manager.getClusterManagmentTool()
+ .manuallyEnableMaintenanceMode(manager.getClusterName(), false,
+ String.format(_emmReason, manager.getInstanceName(),
System.currentTimeMillis()),
+ null);
+ } else {
+ LOG.info(
Review Comment:
Nit: not sure if this will cause too large log size. Let's think about it
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/DefaultCloudEventCallbackImpl.java:
##########
@@ -19,51 +19,102 @@
* under the License.
*/
+import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* A default callback implementation class to be used in {@link
HelixCloudEventListener}
*/
public class DefaultCloudEventCallbackImpl {
+ private static final Logger LOG =
LoggerFactory.getLogger(DefaultCloudEventCallbackImpl.class);
+ private final String _instanceReason = "Cloud event in
DefaultCloudEventCallback at %s";
+ private final String _emmReason = "Cloud event EMM in
DefaultCloudEventCallback by %s at %s";
/**
- * Disable the instance
+ * Disable the instance and track the cloud event in map field
disabledInstancesWithInfo in
+ * cluster config. Will not re-disable the instance if the instance is
already disabled for
+ * other reason. (So we will not overwrite the disabled reason and enable
this instance when
+ * on-unpause)
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void disableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ LOG.info("DefaultCloudEventCallbackImpl disabled Instance {}",
manager.getInstanceName());
+ if (InstanceValidationUtil
+ .isEnabled(manager.getHelixDataAccessor(), manager.getInstanceName()))
{
+ manager.getClusterManagmentTool()
+ .enableInstance(manager.getClusterName(), manager.getInstanceName(),
false,
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message);
+ }
+
HelixEventHandlingUtil.updateCloudEventOperationInClusterConfig(manager.getClusterName(),
Review Comment:
Nit: Let's put a TODO here saying that these two steps should be
transactional if we ever have the transactional support available
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/HelixEventHandlingUtil.java:
##########
@@ -19,40 +19,103 @@
* under the License.
*/
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.helix.AccessOption;
import org.apache.helix.BaseDataAccessor;
+import org.apache.helix.HelixDataAccessor;
+import org.apache.helix.HelixException;
+import org.apache.helix.PropertyPathBuilder;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.manager.zk.ZKHelixAdmin;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.model.InstanceConfig;
+import org.apache.helix.util.ConfigStringUtil;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.apache.helix.zookeeper.datamodel.ZNRecord;
+import org.apache.helix.zookeeper.zkclient.DataUpdater;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
- class HelixEventHandlingUtil {
+class HelixEventHandlingUtil {
+ private static Logger LOG =
LoggerFactory.getLogger(HelixEventHandlingUtil.class);
/**
- * Enable or disable an instance for cloud event.
- * It will enable/disable Helix for that instance. Also add the instance
cloud event info to
- * clusterConfig Znode when enable.
- * @param clusterName
+ * check if instance is disabled by cloud event.
* @param instanceName
- * @param message
- * @param isEnable
* @param dataAccessor
- * @return return failure when either enable/disable failed or update
cluster ZNode failed.
+ * @return return true only when instance is Helix disabled and the disabled
reason in
+ * instanceConfig is cloudEvent
*/
- static boolean enableInstanceForCloudEvent(String clusterName, String
instanceName, String message,
- boolean isEnable, BaseDataAccessor dataAccessor) {
- // TODO add impl here
- return true;
+ static boolean isInstanceDisabledForCloudEvent(String instanceName,
+ HelixDataAccessor dataAccessor) {
+ InstanceConfig instanceConfig =
+
dataAccessor.getProperty(dataAccessor.keyBuilder().instanceConfig(instanceName));
+ return !InstanceValidationUtil.isEnabled(dataAccessor, instanceName) &&
instanceConfig
+ .getInstanceDisabledType()
+ .equals(InstanceConstants.InstanceDisabledType.CLOUD_EVENT.name());
}
/**
- * check if instance is disabled by cloud event.
- * @param clusterName
- * @param instanceName
- * @param dataAccessor
- * @return return true only when instance is Helix disabled and has the
cloud event info in
- * clusterConfig ZNode.
+ * Update map field disabledInstancesWithInfo in clusterConfig with
cloudEvent instance info
*/
- static boolean IsInstanceDisabledForCloudEvent(String clusterName, String
instanceName,
- BaseDataAccessor dataAccessor) {
- // TODO add impl here
- return true;
+ static void updateCloudEventOperationInClusterConfig(String clusterName,
String instanceName,
Review Comment:
Nit: Could we simplify this method signature to have HelixManager passed,
and get info such as clusterName, instanceName, and baseAccessor from the
HelixManager?
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/DefaultCloudEventCallbackImpl.java:
##########
@@ -19,51 +19,102 @@
* under the License.
*/
+import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* A default callback implementation class to be used in {@link
HelixCloudEventListener}
*/
public class DefaultCloudEventCallbackImpl {
+ private static final Logger LOG =
LoggerFactory.getLogger(DefaultCloudEventCallbackImpl.class);
+ private final String _instanceReason = "Cloud event in
DefaultCloudEventCallback at %s";
+ private final String _emmReason = "Cloud event EMM in
DefaultCloudEventCallback by %s at %s";
/**
- * Disable the instance
+ * Disable the instance and track the cloud event in map field
disabledInstancesWithInfo in
+ * cluster config. Will not re-disable the instance if the instance is
already disabled for
+ * other reason. (So we will not overwrite the disabled reason and enable
this instance when
+ * on-unpause)
* @param manager The helix manager associated with the listener
* @param eventInfo Detailed information about the event
*/
public void disableInstance(HelixManager manager, Object eventInfo) {
- // To be implemented
- throw new NotImplementedException();
+ String message = String.format(_instanceReason,
System.currentTimeMillis());
+ LOG.info("DefaultCloudEventCallbackImpl disabled Instance {}",
manager.getInstanceName());
Review Comment:
Nit: "disabled" is not appropriate here since the instance is not disabled
yet
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/HelixEventHandlingUtil.java:
##########
@@ -19,40 +19,103 @@
* under the License.
*/
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.helix.AccessOption;
import org.apache.helix.BaseDataAccessor;
+import org.apache.helix.HelixDataAccessor;
+import org.apache.helix.HelixException;
+import org.apache.helix.PropertyPathBuilder;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.manager.zk.ZKHelixAdmin;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.model.InstanceConfig;
+import org.apache.helix.util.ConfigStringUtil;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.apache.helix.zookeeper.datamodel.ZNRecord;
+import org.apache.helix.zookeeper.zkclient.DataUpdater;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
- class HelixEventHandlingUtil {
+class HelixEventHandlingUtil {
+ private static Logger LOG =
LoggerFactory.getLogger(HelixEventHandlingUtil.class);
/**
- * Enable or disable an instance for cloud event.
- * It will enable/disable Helix for that instance. Also add the instance
cloud event info to
- * clusterConfig Znode when enable.
- * @param clusterName
+ * check if instance is disabled by cloud event.
* @param instanceName
- * @param message
- * @param isEnable
* @param dataAccessor
- * @return return failure when either enable/disable failed or update
cluster ZNode failed.
+ * @return return true only when instance is Helix disabled and the disabled
reason in
+ * instanceConfig is cloudEvent
*/
- static boolean enableInstanceForCloudEvent(String clusterName, String
instanceName, String message,
- boolean isEnable, BaseDataAccessor dataAccessor) {
- // TODO add impl here
- return true;
+ static boolean isInstanceDisabledForCloudEvent(String instanceName,
+ HelixDataAccessor dataAccessor) {
+ InstanceConfig instanceConfig =
+
dataAccessor.getProperty(dataAccessor.keyBuilder().instanceConfig(instanceName));
+ return !InstanceValidationUtil.isEnabled(dataAccessor, instanceName) &&
instanceConfig
+ .getInstanceDisabledType()
Review Comment:
Should we do a null check for instanceConfig?
##########
helix-core/src/main/java/org/apache/helix/cloud/event/helix/HelixEventHandlingUtil.java:
##########
@@ -19,40 +19,103 @@
* under the License.
*/
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.helix.AccessOption;
import org.apache.helix.BaseDataAccessor;
+import org.apache.helix.HelixDataAccessor;
+import org.apache.helix.HelixException;
+import org.apache.helix.PropertyPathBuilder;
+import org.apache.helix.constants.InstanceConstants;
+import org.apache.helix.manager.zk.ZKHelixAdmin;
+import org.apache.helix.model.ClusterConfig;
+import org.apache.helix.model.InstanceConfig;
+import org.apache.helix.util.ConfigStringUtil;
+import org.apache.helix.util.InstanceValidationUtil;
+import org.apache.helix.zookeeper.datamodel.ZNRecord;
+import org.apache.helix.zookeeper.zkclient.DataUpdater;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
- class HelixEventHandlingUtil {
+class HelixEventHandlingUtil {
+ private static Logger LOG =
LoggerFactory.getLogger(HelixEventHandlingUtil.class);
/**
- * Enable or disable an instance for cloud event.
- * It will enable/disable Helix for that instance. Also add the instance
cloud event info to
- * clusterConfig Znode when enable.
- * @param clusterName
+ * check if instance is disabled by cloud event.
* @param instanceName
- * @param message
- * @param isEnable
* @param dataAccessor
- * @return return failure when either enable/disable failed or update
cluster ZNode failed.
+ * @return return true only when instance is Helix disabled and the disabled
reason in
+ * instanceConfig is cloudEvent
*/
- static boolean enableInstanceForCloudEvent(String clusterName, String
instanceName, String message,
- boolean isEnable, BaseDataAccessor dataAccessor) {
- // TODO add impl here
- return true;
+ static boolean isInstanceDisabledForCloudEvent(String instanceName,
+ HelixDataAccessor dataAccessor) {
+ InstanceConfig instanceConfig =
+
dataAccessor.getProperty(dataAccessor.keyBuilder().instanceConfig(instanceName));
+ return !InstanceValidationUtil.isEnabled(dataAccessor, instanceName) &&
instanceConfig
+ .getInstanceDisabledType()
+ .equals(InstanceConstants.InstanceDisabledType.CLOUD_EVENT.name());
}
/**
- * check if instance is disabled by cloud event.
- * @param clusterName
- * @param instanceName
- * @param dataAccessor
- * @return return true only when instance is Helix disabled and has the
cloud event info in
- * clusterConfig ZNode.
+ * Update map field disabledInstancesWithInfo in clusterConfig with
cloudEvent instance info
*/
- static boolean IsInstanceDisabledForCloudEvent(String clusterName, String
instanceName,
- BaseDataAccessor dataAccessor) {
- // TODO add impl here
- return true;
+ static void updateCloudEventOperationInClusterConfig(String clusterName,
String instanceName,
+ BaseDataAccessor baseAccessor, boolean enable, String message) {
+ String path = PropertyPathBuilder.clusterConfig(clusterName);
+
+ if (!baseAccessor.exists(path, 0)) {
+ throw new HelixException("Cluster " + clusterName + ": cluster config
does not exist");
+ }
+
+ if (!baseAccessor.update(path, new DataUpdater<ZNRecord>() {
+ @Override
+ public ZNRecord update(ZNRecord currentData) {
+ if (currentData == null) {
+ throw new HelixException("Cluster: " + clusterName + ": cluster
config is null");
+ }
+
+ ClusterConfig clusterConfig = new ClusterConfig(currentData);
+ Map<String, String> disabledInstancesWithInfo =
+ new TreeMap<>(clusterConfig.getDisabledInstancesWithInfo());
+ if (enable) {
+ disabledInstancesWithInfo.keySet().remove(instanceName);
+ } else {
+ // disabledInstancesWithInfo is only used for cloud event handling.
+ String timeStamp = String.valueOf(System.currentTimeMillis());
+ disabledInstancesWithInfo.put(instanceName, ZKHelixAdmin
+ .assembleInstanceBatchedDisabledInfo(
+ InstanceConstants.InstanceDisabledType.CLOUD_EVENT, message,
timeStamp));
+ }
+ clusterConfig.setDisabledInstancesWithInfo(disabledInstancesWithInfo);
+
+ return clusterConfig.getRecord();
+ }
+ }, AccessOption.PERSISTENT)) {
+ LOG.error("Failed to update cluster config {} for {} instance {}. {}",
clusterName,
+ enable ? "enable" : "disable", instanceName, message);
+ }
}
+ /**
+ * Return true if no instance is under cloud event handling
+ * @param clusterConfig
+ * @return
+ */
+ static boolean checkNoInstanceUnderCloudEvent(ClusterConfig clusterConfig) {
+ Map<String, String> clusterConfigTrackedEvent =
clusterConfig.getDisabledInstancesWithInfo();
Review Comment:
Null check on clusterConfig?
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