[Backend][Slack] Slack integration with UI (#6261)

* [Backend][Slack] Slack integration with UI

* [Backend][Slack] Slack integration with UI - removed unused jdbi

* [Backend][Slack] Slack integration with UI - URL fix + init webhook url during initialization

* [Backend][Slack] Slack integration with UI - remove slack

* [Backend][Slack] add Slack generic to exisiting jsons

* [Backend][Slack] PG fix and Java CheckStyle

bootstrap/sql/com.mysql.cj.jdbc.Driver/v004__create_db_connection_info.sql

@@ -31,3 +31,6 @@ WHERE serviceType = 'Looker';
 UPDATE dashboard_service_entity
 SET json = JSON_REMOVE(json, '$.connection.config.env')
 WHERE serviceType = 'Looker';
+
+UPDATE webhook_entity
+SET json = JSON_INSERT(json, '$.webhookType', 'generic');

bootstrap/sql/org.postgresql.Driver/v004__create_db_connection_info.sql

@@ -25,3 +25,6 @@ WHERE serviceType = 'Looker'
 UPDATE dashboard_service_entity
 SET json = json::jsonb #- '{connection,config,username}' #- '{connection,config,password}' #- '{connection,config,env}'
 WHERE serviceType = 'Looker';
+
+UPDATE webhook_entity
+SET json = JSONB_SET(json::jsonb, '{webhookType}', '"generic"', true);

catalog-rest-service/src/main/java/org/openmetadata/catalog/CatalogApplication.java

@@ -79,8 +79,6 @@ import org.openmetadata.catalog.security.AuthorizerConfiguration;
 import org.openmetadata.catalog.security.NoopAuthorizer;
 import org.openmetadata.catalog.security.NoopFilter;
 import org.openmetadata.catalog.security.jwt.JWTTokenGenerator;
-import org.openmetadata.catalog.slack.SlackPublisherConfiguration;
-import org.openmetadata.catalog.slack.SlackWebhookEventPublisher;
 import org.openmetadata.catalog.socket.FeedServlet;
 import org.openmetadata.catalog.socket.SocketAddressFilter;
 import org.openmetadata.catalog.socket.WebSocketManager;
@@ -148,13 +146,14 @@ public class CatalogApplication extends Application<CatalogApplicationConfig> {
     environment.jersey().register(new EarlyEofExceptionMapper());
     environment.jersey().register(JsonMappingExceptionMapper.class);
     environment.healthChecks().register("OpenMetadataServerHealthCheck", new OpenMetadataServerHealthCheck());
+    // start event hub before registering publishers
+    EventPubSub.start();
+
     registerResources(catalogConfig, environment, jdbi, secretsManager);
 
     // Register Event Handler
     registerEventFilter(catalogConfig, environment, jdbi);
     environment.lifecycle().manage(new ManagedShutdown());
-    // start event hub before registering publishers
-    EventPubSub.start();
     // Register Event publishers
     registerEventPublisher(catalogConfig);
 
@@ -252,17 +251,6 @@ public class CatalogApplication extends Application<CatalogApplicationConfig> {
           new ElasticSearchEventPublisher(catalogApplicationConfig.getElasticSearchConfiguration());
       EventPubSub.addEventHandler(elasticSearchEventPublisher);
     }
-    // register slack Event publishers
-    if (catalogApplicationConfig.getSlackEventPublishers() != null) {
-      for (SlackPublisherConfiguration slackPublisherConfiguration :
-          catalogApplicationConfig.getSlackEventPublishers()) {
-        if (slackPublisherConfiguration.getWebhookUrl() != null
-            && !slackPublisherConfiguration.getWebhookUrl().isEmpty()) {
-          SlackWebhookEventPublisher slackPublisher = new SlackWebhookEventPublisher(slackPublisherConfiguration);
-          EventPubSub.addEventHandler(slackPublisher);
-        }
-      }
-    }
   }
 
   private void registerResources(

catalog-rest-service/src/main/java/org/openmetadata/catalog/events/AbstractEventPublisher.java

@@ -13,16 +13,16 @@ import org.openmetadata.catalog.type.EventType;
 @Slf4j
 public abstract class AbstractEventPublisher implements EventPublisher {
   // Backoff timeout in seconds. Delivering events is retried 5 times.
-  private static final int BACKOFF_NORMAL = 0;
-  private static final int BACKOFF_3_SECONDS = 3 * 1000;
-  private static final int BACKOFF_30_SECONDS = 30 * 1000;
-  private static final int BACKOFF_5_MINUTES = 5 * 60 * 1000;
-  private static final int BACKOFF_1_HOUR = 60 * 60 * 1000;
-  private static final int BACKOFF_24_HOUR = 24 * 60 * 60 * 1000;
+  protected static final int BACKOFF_NORMAL = 0;
+  protected static final int BACKOFF_3_SECONDS = 3 * 1000;
+  protected static final int BACKOFF_30_SECONDS = 30 * 1000;
+  protected static final int BACKOFF_5_MINUTES = 5 * 60 * 1000;
+  protected static final int BACKOFF_1_HOUR = 60 * 60 * 1000;
+  protected static final int BACKOFF_24_HOUR = 24 * 60 * 60 * 1000;
 
-  private int currentBackoffTime = BACKOFF_NORMAL;
-  private final List<ChangeEvent> batch = new ArrayList<>();
-  private final ConcurrentHashMap<EventType, List<String>> filter = new ConcurrentHashMap<>();
+  protected int currentBackoffTime = BACKOFF_NORMAL;
+  protected final List<ChangeEvent> batch = new ArrayList<>();
+  protected final ConcurrentHashMap<EventType, List<String>> filter = new ConcurrentHashMap<>();
   private final int batchSize;
 
   protected AbstractEventPublisher(int batchSize, List<EventFilter> filters) {
@@ -63,7 +63,7 @@ public abstract class AbstractEventPublisher implements EventPublisher {
     }
   }
 
-  private void setNextBackOff() {
+  protected void setNextBackOff() {
     if (currentBackoffTime == BACKOFF_NORMAL) {
       currentBackoffTime = BACKOFF_3_SECONDS;
     } else if (currentBackoffTime == BACKOFF_3_SECONDS) {

catalog-rest-service/src/main/java/org/openmetadata/catalog/events/EventPublisher.java

@@ -2,10 +2,9 @@ package org.openmetadata.catalog.events;
 
 import com.lmax.disruptor.EventHandler;
 import com.lmax.disruptor.LifecycleAware;
-import org.openmetadata.catalog.events.errors.EventPublisherException;
 import org.openmetadata.catalog.resources.events.EventResource.ChangeEventList;
 
 public interface EventPublisher extends EventHandler<EventPubSub.ChangeEventHolder>, LifecycleAware {
 
-  void publish(ChangeEventList events) throws EventPublisherException;
+  void publish(ChangeEventList events) throws Exception;
 }

catalog-rest-service/src/main/java/org/openmetadata/catalog/events/WebhookPublisher.java

@@ -0,0 +1,208 @@
+/*
+ *  Copyright 2021 Collate
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.openmetadata.catalog.events;
+
+import com.lmax.disruptor.BatchEventProcessor;
+import java.io.IOException;
+import java.net.UnknownHostException;
+import java.util.Map;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Invocation;
+import javax.ws.rs.core.Response;
+import lombok.extern.slf4j.Slf4j;
+import org.openmetadata.catalog.events.errors.EventPublisherException;
+import org.openmetadata.catalog.jdbi3.CollectionDAO;
+import org.openmetadata.catalog.jdbi3.EntityRepository;
+import org.openmetadata.catalog.jdbi3.WebhookRepository;
+import org.openmetadata.catalog.jdbi3.WebhookRepository.WebhookUpdater;
+import org.openmetadata.catalog.resources.events.EventResource;
+import org.openmetadata.catalog.security.SecurityUtil;
+import org.openmetadata.catalog.type.FailureDetails;
+import org.openmetadata.catalog.type.Webhook;
+import org.openmetadata.catalog.util.JsonUtils;
+import org.openmetadata.catalog.util.RestUtil;
+import org.openmetadata.common.utils.CommonUtil;
+
+/**
+ * WebhookPublisher publishes events to the webhook endpoint using POST http requests. There is one instance of
+ * WebhookPublisher per webhook subscription. Each WebhookPublish is an EventHandler that runs in a separate thread and
+ * receives events from LMAX Disruptor {@link EventPubSub} through {@link BatchEventProcessor}.
+ *
+ * <p>The failures during callback to Webhook endpoints are handled in this class as follows:
+ *
+ * <ul>
+ *   <li>Webhook with unresolvable URLs are marked as "failed" and no further attempt is made to deliver the events
+ *   <li>Webhook callbacks that return 3xx are marked as "failed" and no further attempt is made to deliver the events
+ *   <li>Webhook callbacks that return 4xx, 5xx, or timeout are marked as "awaitingRetry" and 5 retry attempts are made
+ *       to deliver the events with the following backoff - 3 seconds, 30 seconds, 5 minutes, 1 hours, and 24 hour. When
+ *       all the 5 delivery attempts fail, the webhook state is marked as "retryLimitReached" and no further attempt is
+ *       made to deliver the events.
+ * </ul>
+ */
+@Slf4j
+public class WebhookPublisher extends AbstractEventPublisher {
+  private final CountDownLatch shutdownLatch = new CountDownLatch(1);
+  private final Webhook webhook;
+  private BatchEventProcessor<EventPubSub.ChangeEventHolder> processor;
+  private Client client;
+  private CollectionDAO daoCollection;
+
+  private WebhookRepository webhookRepository;
+
+  public WebhookPublisher(Webhook webhook, CollectionDAO dao) {
+    super(webhook.getBatchSize(), webhook.getEventFilters());
+    this.webhook = webhook;
+    this.daoCollection = dao;
+    this.webhookRepository = new WebhookRepository(dao);
+  }
+
+  @Override
+  public void onStart() {
+    createClient();
+    webhook.withFailureDetails(new FailureDetails());
+    LOG.info("Webhook-lifecycle-onStart {}", webhook.getName());
+  }
+
+  @Override
+  public void onShutdown() {
+    currentBackoffTime = BACKOFF_NORMAL;
+    client.close();
+    client = null;
+    shutdownLatch.countDown();
+    LOG.info("Webhook-lifecycle-onShutdown {}", webhook.getName());
+  }
+
+  public synchronized Webhook getWebhook() {
+    return webhook;
+  }
+
+  public synchronized void updateWebhook(Webhook updatedWebhook) {
+    currentBackoffTime = BACKOFF_NORMAL;
+    webhook.setTimeout(updatedWebhook.getTimeout());
+    webhook.setBatchSize(updatedWebhook.getBatchSize());
+    webhook.setEndpoint(updatedWebhook.getEndpoint());
+    webhook.setEventFilters(updatedWebhook.getEventFilters());
+    updateFilter();
+    createClient();
+  }
+
+  private void updateFilter() {
+    filter.clear();
+    webhook.getEventFilters().forEach(f -> filter.put(f.getEventType(), f.getEntities()));
+  }
+
+  private void setErrorStatus(Long attemptTime, Integer statusCode, String reason) throws IOException {
+    if (!attemptTime.equals(webhook.getFailureDetails().getLastFailedAt())) {
+      setStatus(Webhook.Status.FAILED, attemptTime, statusCode, reason, null);
+    }
+    throw new RuntimeException(reason);
+  }
+
+  private void setAwaitingRetry(Long attemptTime, int statusCode, String reason) throws IOException {
+    if (!attemptTime.equals(webhook.getFailureDetails().getLastFailedAt())) {
+      setStatus(Webhook.Status.AWAITING_RETRY, attemptTime, statusCode, reason, attemptTime + currentBackoffTime);
+    }
+  }
+
+  private void setStatus(Webhook.Status status, Long attemptTime, Integer statusCode, String reason, Long timestamp)
+      throws IOException {
+    Webhook stored = daoCollection.webhookDAO().findEntityById(webhook.getId());
+    webhook.setStatus(status);
+    webhook
+        .getFailureDetails()
+        .withLastFailedAt(attemptTime)
+        .withLastFailedStatusCode(statusCode)
+        .withLastFailedReason(reason)
+        .withNextAttempt(timestamp);
+
+    // TODO: Fix this
+    WebhookUpdater updater = webhookRepository.getUpdater(stored, webhook, EntityRepository.Operation.PUT);
+    updater.update();
+  }
+
+  private synchronized void createClient() {
+    if (client != null) {
+      client.close();
+      client = null;
+    }
+    ClientBuilder clientBuilder = ClientBuilder.newBuilder();
+    clientBuilder.connectTimeout(10, TimeUnit.SECONDS);
+    clientBuilder.readTimeout(12, TimeUnit.SECONDS);
+    client = clientBuilder.build();
+  }
+
+  public void awaitShutdown() throws InterruptedException {
+    LOG.info("Awaiting shutdown webhook-lifecycle {}", webhook.getName());
+    shutdownLatch.await(5, TimeUnit.SECONDS);
+  }
+
+  public void setProcessor(BatchEventProcessor<EventPubSub.ChangeEventHolder> processor) {
+    this.processor = processor;
+  }
+
+  public BatchEventProcessor<EventPubSub.ChangeEventHolder> getProcessor() {
+    return processor;
+  }
+
+  private Invocation.Builder getTarget() {
+    Map<String, String> authHeaders = SecurityUtil.authHeaders("admin@open-metadata.org");
+    return SecurityUtil.addHeaders(client.target(webhook.getEndpoint()), authHeaders);
+  }
+
+  @Override
+  public void publish(EventResource.ChangeEventList list) throws EventPublisherException, IOException {
+    long attemptTime = System.currentTimeMillis();
+    try {
+      String json = JsonUtils.pojoToJson(list);
+      Response response;
+      if (webhook.getSecretKey() != null && !webhook.getSecretKey().isEmpty()) {
+        String hmac = "sha256=" + CommonUtil.calculateHMAC(webhook.getSecretKey(), json);
+        response = getTarget().header(RestUtil.SIGNATURE_HEADER, hmac).post(javax.ws.rs.client.Entity.json(json));
+      } else {
+        response = getTarget().post(javax.ws.rs.client.Entity.json(json));
+      }
+      LOG.info(
+          "Webhook {}:{}:{} received response {}",
+          webhook.getName(),
+          webhook.getStatus(),
+          batch.size(),
+          response.getStatusInfo());
+      // 2xx response means call back is successful
+      if (response.getStatus() >= 200 && response.getStatus() < 300) { // All 2xx responses
+        webhook.getFailureDetails().setLastSuccessfulAt(batch.get(batch.size() - 1).getTimestamp());
+        batch.clear();
+        if (webhook.getStatus() != Webhook.Status.ACTIVE) {
+          setStatus(Webhook.Status.ACTIVE, null, null, null, null);
+        }
+        // 3xx response/redirection is not allowed for callback. Set the webhook state as in error
+      } else if (response.getStatus() >= 300 && response.getStatus() < 400) {
+        setErrorStatus(attemptTime, response.getStatus(), response.getStatusInfo().getReasonPhrase());
+        // 4xx, 5xx response retry delivering events after timeout
+      } else if (response.getStatus() >= 300 && response.getStatus() < 600) {
+        setNextBackOff();
+        setAwaitingRetry(attemptTime, response.getStatus(), response.getStatusInfo().getReasonPhrase());
+        Thread.sleep(currentBackoffTime);
+      }
+    } catch (Exception ex) {
+      Throwable cause = ex.getCause();
+      if (cause.getClass() == UnknownHostException.class) {
+        LOG.warn("Invalid webhook {} endpoint {}", webhook.getName(), webhook.getEndpoint());
+        setErrorStatus(attemptTime, null, "UnknownHostException");
+      }
+    }
+  }
+}

catalog-rest-service/src/main/java/org/openmetadata/catalog/jdbi3/CollectionDAO.java

@@ -1376,6 +1376,9 @@ public interface CollectionDAO {
     default boolean supportsSoftDelete() {
       return false;
     }
+
+    @SqlQuery("SELECT json FROM <table>")
+    List<String> listAllWebhooks(@Define("table") String table);
   }
 
   interface TagCategoryDAO extends EntityDAO<TagCategory> {

catalog-rest-service/src/main/java/org/openmetadata/catalog/jdbi3/EntityRepository.java

@@ -1092,7 +1092,7 @@ public abstract class EntityRepository<T extends EntityInterface> {
     return ingestionPipelines;
   }
 
-  enum Operation {
+  public enum Operation {
     PUT,
     PATCH,
     SOFT_DELETE;

catalog-rest-service/src/main/java/org/openmetadata/catalog/jdbi3/WebhookRepository.java

@@ -18,40 +18,23 @@ import static org.openmetadata.catalog.util.EntityUtil.failureDetailsMatch;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.lmax.disruptor.BatchEventProcessor;
-import com.lmax.disruptor.EventHandler;
-import com.lmax.disruptor.LifecycleAware;
 import java.io.IOException;
-import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.TimeUnit;
-import javax.ws.rs.ProcessingException;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.ClientBuilder;
-import javax.ws.rs.client.Invocation.Builder;
-import javax.ws.rs.core.Response;
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
 import org.openmetadata.catalog.Entity;
 import org.openmetadata.catalog.events.EventPubSub;
 import org.openmetadata.catalog.events.EventPubSub.ChangeEventHolder;
-import org.openmetadata.catalog.resources.events.EventResource.ChangeEventList;
+import org.openmetadata.catalog.events.WebhookPublisher;
 import org.openmetadata.catalog.resources.events.WebhookResource;
-import org.openmetadata.catalog.security.SecurityUtil;
-import org.openmetadata.catalog.type.ChangeEvent;
+import org.openmetadata.catalog.slack.SlackWebhookEventPublisher;
 import org.openmetadata.catalog.type.EventFilter;
-import org.openmetadata.catalog.type.EventType;
-import org.openmetadata.catalog.type.FailureDetails;
 import org.openmetadata.catalog.type.Webhook;
 import org.openmetadata.catalog.type.Webhook.Status;
 import org.openmetadata.catalog.util.EntityUtil.Fields;
-import org.openmetadata.catalog.util.JsonUtils;
-import org.openmetadata.catalog.util.RestUtil;
-import org.openmetadata.common.utils.CommonUtil;
 
 @Slf4j
 public class WebhookRepository extends EntityRepository<Webhook> {
@@ -101,7 +84,13 @@ public class WebhookRepository extends EntityRepository<Webhook> {
       webhook.setStatus(Status.DISABLED);
       return;
     }
-    WebhookPublisher publisher = new WebhookPublisher(webhook);
+
+    WebhookPublisher publisher;
+    if (webhook.getWebhookType() == Webhook.WebhookType.slack) {
+      publisher = new SlackWebhookEventPublisher(webhook, daoCollection);
+    } else {
+      publisher = new WebhookPublisher(webhook, daoCollection);
+    }
     BatchEventProcessor<ChangeEventHolder> processor = EventPubSub.addEventHandler(publisher);
     publisher.setProcessor(processor);
     webhookPublisherMap.put(webhook.getId(), publisher);
@@ -145,207 +134,6 @@ public class WebhookRepository extends EntityRepository<Webhook> {
     webhookPublisherMap.remove(id);
   }
 
-  /**
-   * WebhookPublisher publishes events to the webhook endpoint using POST http requests. There is one instance of
-   * WebhookPublisher per webhook subscription. Each WebhookPublish is an EventHandler that runs in a separate thread
-   * and receives events from LMAX Disruptor {@link EventPubSub} through {@link BatchEventProcessor}.
-   *
-   * <p>The failures during callback to Webhook endpoints are handled in this class as follows:
-   *
-   * <ul>
-   *   <li>Webhook with unresolvable URLs are marked as "failed" and no further attempt is made to deliver the events
-   *   <li>Webhook callbacks that return 3xx are marked as "failed" and no further attempt is made to deliver the events
-   *   <li>Webhook callbacks that return 4xx, 5xx, or timeout are marked as "awaitingRetry" and 5 retry attempts are
-   *       made to deliver the events with the following backoff - 3 seconds, 30 seconds, 5 minutes, 1 hours, and 24
-   *       hour. When all the 5 delivery attempts fail, the webhook state is marked as "retryLimitReached" and no
-   *       further attempt is made to deliver the events.
-   * </ul>
-   */
-  public class WebhookPublisher implements EventHandler<ChangeEventHolder>, LifecycleAware {
-    // Backoff timeout in seconds. Delivering events is retried 5 times.
-    private static final int BACKOFF_NORMAL = 0;
-    private static final int BACKOFF_3_SECONDS = 3 * 1000;
-    private static final int BACKOFF_30_SECONDS = 30 * 1000;
-    private static final int BACKOFF_5_MINUTES = 5 * 60 * 1000;
-    private static final int BACKOFF_1_HOUR = 60 * 60 * 1000;
-    private static final int BACKOFF_24_HOUR = 24 * 60 * 60 * 1000;
-
-    private int currentBackoffTime = BACKOFF_NORMAL;
-    private final CountDownLatch shutdownLatch = new CountDownLatch(1);
-    private final Webhook webhook;
-    private final List<ChangeEvent> batch = new ArrayList<>();
-    private BatchEventProcessor<ChangeEventHolder> processor;
-    private Client client;
-    private final ConcurrentHashMap<EventType, List<String>> filter = new ConcurrentHashMap<>();
-
-    public WebhookPublisher(Webhook webhook) {
-      this.webhook = webhook;
-      initFilter();
-    }
-
-    @Override
-    public void onStart() {
-      createClient();
-      webhook.withFailureDetails(new FailureDetails());
-      LOG.info("Webhook-lifecycle-onStart {}", webhook.getName());
-    }
-
-    @Override
-    public void onEvent(ChangeEventHolder changeEventHolder, long sequence, boolean endOfBatch) throws Exception {
-      // Ignore events that don't match the webhook event filters
-      ChangeEvent changeEvent = changeEventHolder.get();
-      List<String> entities = filter.get(changeEvent.getEventType());
-      if (entities == null || (!entities.get(0).equals("*") && !entities.contains(changeEvent.getEntityType()))) {
-        return;
-      }
-
-      // Batch until either the batch has ended or batch size has reached the max size
-      batch.add(changeEventHolder.get());
-      if (!endOfBatch && batch.size() < webhook.getBatchSize()) {
-        return;
-      }
-
-      ChangeEventList list = new ChangeEventList(batch, null, null, batch.size());
-      long attemptTime = System.currentTimeMillis();
-      try {
-        String json = JsonUtils.pojoToJson(list);
-        Response response;
-        if (webhook.getSecretKey() != null && !webhook.getSecretKey().isEmpty()) {
-          String hmac = "sha256=" + CommonUtil.calculateHMAC(webhook.getSecretKey(), json);
-          response = getTarget().header(RestUtil.SIGNATURE_HEADER, hmac).post(javax.ws.rs.client.Entity.json(json));
-        } else {
-          response = getTarget().post(javax.ws.rs.client.Entity.json(json));
-        }
-        LOG.info(
-            "Webhook {}:{}:{} received response {}",
-            webhook.getName(),
-            webhook.getStatus(),
-            batch.size(),
-            response.getStatusInfo());
-        // 2xx response means call back is successful
-        if (response.getStatus() >= 200 && response.getStatus() < 300) { // All 2xx responses
-          batch.clear();
-          webhook.getFailureDetails().setLastSuccessfulAt(changeEventHolder.get().getTimestamp());
-          if (webhook.getStatus() != Status.ACTIVE) {
-            setStatus(Status.ACTIVE, null, null, null, null);
-          }
-          // 3xx response/redirection is not allowed for callback. Set the webhook state as in error
-        } else if (response.getStatus() >= 300 && response.getStatus() < 400) {
-          setErrorStatus(attemptTime, response.getStatus(), response.getStatusInfo().getReasonPhrase());
-          // 4xx, 5xx response retry delivering events after timeout
-        } else if (response.getStatus() >= 300 && response.getStatus() < 600) {
-          setNextBackOff();
-          setAwaitingRetry(attemptTime, response.getStatus(), response.getStatusInfo().getReasonPhrase());
-          Thread.sleep(currentBackoffTime);
-        }
-      } catch (ProcessingException ex) {
-        Throwable cause = ex.getCause();
-        if (cause.getClass() == UnknownHostException.class) {
-          LOG.warn("Invalid webhook {} endpoint {}", webhook.getName(), webhook.getEndpoint());
-          setErrorStatus(attemptTime, null, "UnknownHostException");
-        }
-      }
-    }
-
-    @Override
-    public void onShutdown() {
-      currentBackoffTime = BACKOFF_NORMAL;
-      client.close();
-      client = null;
-      shutdownLatch.countDown();
-      LOG.info("Webhook-lifecycle-onShutdown {}", webhook.getName());
-    }
-
-    public synchronized Webhook getWebhook() {
-      return webhook;
-    }
-
-    public synchronized void updateWebhook(Webhook updatedWebhook) {
-      currentBackoffTime = BACKOFF_NORMAL;
-      webhook.setTimeout(updatedWebhook.getTimeout());
-      webhook.setBatchSize(updatedWebhook.getBatchSize());
-      webhook.setEndpoint(updatedWebhook.getEndpoint());
-      webhook.setEventFilters(updatedWebhook.getEventFilters());
-      initFilter();
-      createClient();
-    }
-
-    private void initFilter() {
-      filter.clear();
-      webhook.getEventFilters().forEach(f -> filter.put(f.getEventType(), f.getEntities()));
-    }
-
-    private void setErrorStatus(Long attemptTime, Integer statusCode, String reason) throws IOException {
-      if (!attemptTime.equals(webhook.getFailureDetails().getLastFailedAt())) {
-        setStatus(Status.FAILED, attemptTime, statusCode, reason, null);
-      }
-      throw new RuntimeException(reason);
-    }
-
-    private void setAwaitingRetry(Long attemptTime, int statusCode, String reason) throws IOException {
-      if (!attemptTime.equals(webhook.getFailureDetails().getLastFailedAt())) {
-        setStatus(Status.AWAITING_RETRY, attemptTime, statusCode, reason, attemptTime + currentBackoffTime);
-      }
-    }
-
-    private void setStatus(Status status, Long attemptTime, Integer statusCode, String reason, Long timestamp)
-        throws IOException {
-      Webhook stored = daoCollection.webhookDAO().findEntityById(webhook.getId());
-      webhook.setStatus(status);
-      webhook
-          .getFailureDetails()
-          .withLastFailedAt(attemptTime)
-          .withLastFailedStatusCode(statusCode)
-          .withLastFailedReason(reason)
-          .withNextAttempt(timestamp);
-      WebhookUpdater updater = new WebhookUpdater(stored, webhook, Operation.PUT);
-      updater.update();
-    }
-
-    private synchronized void createClient() {
-      if (client != null) {
-        client.close();
-        client = null;
-      }
-      ClientBuilder clientBuilder = ClientBuilder.newBuilder();
-      clientBuilder.connectTimeout(10, TimeUnit.SECONDS);
-      clientBuilder.readTimeout(12, TimeUnit.SECONDS);
-      client = clientBuilder.build();
-    }
-
-    private void awaitShutdown() throws InterruptedException {
-      LOG.info("Awaiting shutdown webhook-lifecycle {}", webhook.getName());
-      shutdownLatch.await(5, TimeUnit.SECONDS);
-    }
-
-    public void setProcessor(BatchEventProcessor<ChangeEventHolder> processor) {
-      this.processor = processor;
-    }
-
-    public BatchEventProcessor<ChangeEventHolder> getProcessor() {
-      return processor;
-    }
-
-    private void setNextBackOff() {
-      if (currentBackoffTime == BACKOFF_NORMAL) {
-        currentBackoffTime = BACKOFF_3_SECONDS;
-      } else if (currentBackoffTime == BACKOFF_3_SECONDS) {
-        currentBackoffTime = BACKOFF_30_SECONDS;
-      } else if (currentBackoffTime == BACKOFF_30_SECONDS) {
-        currentBackoffTime = BACKOFF_5_MINUTES;
-      } else if (currentBackoffTime == BACKOFF_5_MINUTES) {
-        currentBackoffTime = BACKOFF_1_HOUR;
-      } else if (currentBackoffTime == BACKOFF_1_HOUR) {
-        currentBackoffTime = BACKOFF_24_HOUR;
-      }
-    }
-
-    private Builder getTarget() {
-      Map<String, String> authHeaders = SecurityUtil.authHeaders("admin@open-metadata.org");
-      return SecurityUtil.addHeaders(client.target(webhook.getEndpoint()), authHeaders);
-    }
-  }
-
   public class WebhookUpdater extends EntityUpdater {
     public WebhookUpdater(Webhook original, Webhook updated, Operation operation) {
       super(original, updated, operation);

catalog-rest-service/src/main/java/org/openmetadata/catalog/resources/events/WebhookResource.java

@@ -45,8 +45,10 @@ import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.SecurityContext;
 import javax.ws.rs.core.UriInfo;
+import org.openmetadata.catalog.CatalogApplicationConfig;
 import org.openmetadata.catalog.api.events.CreateWebhook;
 import org.openmetadata.catalog.jdbi3.CollectionDAO;
+import org.openmetadata.catalog.jdbi3.CollectionDAO.WebhookDAO;
 import org.openmetadata.catalog.jdbi3.ListFilter;
 import org.openmetadata.catalog.jdbi3.WebhookRepository;
 import org.openmetadata.catalog.resources.Collection;
@@ -57,6 +59,7 @@ import org.openmetadata.catalog.type.Include;
 import org.openmetadata.catalog.type.Webhook;
 import org.openmetadata.catalog.type.Webhook.Status;
 import org.openmetadata.catalog.util.EntityUtil;
+import org.openmetadata.catalog.util.JsonUtils;
 import org.openmetadata.catalog.util.ResultList;
 
 @Path("/v1/webhook")
@@ -66,6 +69,7 @@ import org.openmetadata.catalog.util.ResultList;
 @Collection(name = "webhook")
 public class WebhookResource extends EntityResource<Webhook, WebhookRepository> {
   public static final String COLLECTION_PATH = "v1/webhook/";
+  private WebhookDAO webhookDAO;
 
   @Override
   public Webhook addHref(UriInfo uriInfo, Webhook entity) {
@@ -84,6 +88,18 @@ public class WebhookResource extends EntityResource<Webhook, WebhookRepository>
 
   public WebhookResource(CollectionDAO dao, Authorizer authorizer) {
     super(Webhook.class, new WebhookRepository(dao), authorizer);
+    webhookDAO = dao.webhookDAO();
+  }
+
+  @SuppressWarnings("unused") // Method used for reflection
+  public void initialize(CatalogApplicationConfig config) throws IOException {
+    try {
+      List<String> listAllWebhooks = webhookDAO.listAllWebhooks(webhookDAO.getTableName());
+      List<Webhook> webhookList = JsonUtils.readObjects(listAllWebhooks, Webhook.class);
+      webhookList.forEach(dao::addWebhookPublisher);
+    } catch (Exception ex) {
+      // Starting application should not fail
+    }
   }
 
   @GET
@@ -339,6 +355,7 @@ public class WebhookResource extends EntityResource<Webhook, WebhookRepository>
         .withTimeout(create.getTimeout())
         .withEnabled(create.getEnabled())
         .withSecretKey(create.getSecretKey())
-        .withStatus(Boolean.TRUE.equals(create.getEnabled()) ? Status.ACTIVE : Status.DISABLED);
+        .withStatus(Boolean.TRUE.equals(create.getEnabled()) ? Status.ACTIVE : Status.DISABLED)
+        .withWebhookType(Webhook.WebhookType.fromValue(create.getWebhookType().value()));
   }
 }

catalog-rest-service/src/main/java/org/openmetadata/catalog/slack/SlackWebhookEventPublisher.java

@@ -1,8 +1,5 @@
 package org.openmetadata.catalog.slack;
 
-import java.net.URI;
-import java.net.URISyntaxException;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 import javax.ws.rs.client.Client;
 import javax.ws.rs.client.ClientBuilder;
@@ -10,27 +7,27 @@ import javax.ws.rs.client.Invocation;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import lombok.extern.slf4j.Slf4j;
-import org.openmetadata.catalog.events.AbstractEventPublisher;
+import org.openmetadata.catalog.events.WebhookPublisher;
 import org.openmetadata.catalog.events.errors.EventPublisherException;
+import org.openmetadata.catalog.jdbi3.CollectionDAO;
 import org.openmetadata.catalog.resources.events.EventResource.ChangeEventList;
 import org.openmetadata.catalog.type.ChangeEvent;
+import org.openmetadata.catalog.type.Webhook;
 import org.openmetadata.catalog.util.ChangeEventParser;
 
 @Slf4j
-public class SlackWebhookEventPublisher extends AbstractEventPublisher {
+public class SlackWebhookEventPublisher extends WebhookPublisher {
   private final Invocation.Builder target;
   private final Client client;
-  private final String openMetadataUrl;
 
-  public SlackWebhookEventPublisher(SlackPublisherConfiguration config) {
-    super(config.getBatchSize(), config.getFilters());
-    String slackWebhookURL = config.getWebhookUrl();
+  public SlackWebhookEventPublisher(Webhook webhook, CollectionDAO dao) {
+    super(webhook, dao);
+    String slackWebhookURL = webhook.getEndpoint().toString();
     ClientBuilder clientBuilder = ClientBuilder.newBuilder();
     clientBuilder.connectTimeout(10, TimeUnit.SECONDS);
     clientBuilder.readTimeout(12, TimeUnit.SECONDS);
     client = clientBuilder.build();
     target = client.target(slackWebhookURL).request();
-    openMetadataUrl = refineUri(config.getOpenMetadataUrl());
   }
 
   @Override
@@ -49,7 +46,7 @@ public class SlackWebhookEventPublisher extends AbstractEventPublisher {
   public void publish(ChangeEventList events) throws EventPublisherException {
     for (ChangeEvent event : events.getData()) {
       try {
-        SlackMessage slackMessage = ChangeEventParser.buildSlackMessage(event, getEntityUrl(event));
+        SlackMessage slackMessage = ChangeEventParser.buildSlackMessage(event);
         Response response =
             target.post(javax.ws.rs.client.Entity.entity(slackMessage, MediaType.APPLICATION_JSON_TYPE));
         if (response.getStatus() >= 300 && response.getStatus() < 400) {
@@ -63,29 +60,4 @@ public class SlackWebhookEventPublisher extends AbstractEventPublisher {
       }
     }
   }
-
-  private String getEntityUrl(ChangeEvent event) {
-    return String.format(
-        "<%s/%s/%s|%s>",
-        openMetadataUrl,
-        event.getEntityType(),
-        event.getEntityFullyQualifiedName(),
-        event.getEntityFullyQualifiedName());
-  }
-
-  private String refineUri(String url) {
-    URI urlInstance = null;
-    try {
-      urlInstance = new URI(url);
-    } catch (URISyntaxException e) {
-      LOG.error("Slack URL is not in url format - {}", url);
-    }
-
-    if (Objects.nonNull(urlInstance)) {
-      String scheme = urlInstance.getScheme();
-      String host = urlInstance.getHost();
-      return String.format("%s://%s", scheme, host);
-    }
-    return url;
-  }
 }

catalog-rest-service/src/main/java/org/openmetadata/catalog/util/ChangeEventParser.java

@@ -20,11 +20,13 @@ import static org.openmetadata.common.utils.CommonUtil.nullOrEmpty;
 
 import com.github.difflib.text.DiffRow;
 import com.github.difflib.text.DiffRowGenerator;
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -69,12 +71,24 @@ public final class ChangeEventParser {
     SLACK
   }
 
-  public static SlackMessage buildSlackMessage(ChangeEvent event, String omdurl) {
+  public static String getEntityUrl(ChangeEvent event) {
+    EntityInterface entity = (EntityInterface) event.getEntity();
+    URI urlInstance = entity.getHref();
+    String fqn = event.getEntityFullyQualifiedName();
+    if (Objects.nonNull(urlInstance)) {
+      String scheme = urlInstance.getScheme();
+      String host = urlInstance.getHost();
+      return String.format("<%s://%s/%s/%s|%s>", scheme, host, event.getEntityType(), fqn, fqn);
+    }
+    return urlInstance.toString();
+  }
+
+  public static SlackMessage buildSlackMessage(ChangeEvent event) {
     SlackMessage slackMessage = new SlackMessage();
     slackMessage.setUsername(event.getUserName());
     if (event.getEntity() != null) {
       String headerTxt = "%s posted on " + event.getEntityType() + " %s";
-      String headerText = String.format(headerTxt, event.getUserName(), omdurl);
+      String headerText = String.format(headerTxt, event.getUserName(), getEntityUrl(event));
       slackMessage.setText(headerText);
     }
     Map<EntityLink, String> messages =

catalog-rest-service/src/main/resources/json/schema/api/events/createWebhook.json

@@ -50,6 +50,20 @@
     "secretKey": {
       "description": "Secret set by the webhook client used for computing HMAC SHA256 signature of webhook payload and sent in `X-OM-Signature` header in POST requests to publish the events.",
       "type": "string"
+    },
+    "webhookType": {
+      "description": "Type of webhook slack,generic etc",
+      "type": "string",
+      "default": "generic",
+      "enum": ["slack", "generic"],
+      "javaEnums": [
+        {
+          "name": "slack"
+        },
+        {
+          "name": "generic"
+        }
+      ]
     }
   },
   "required": ["name", "endpoint", "eventFilters"],

catalog-rest-service/src/main/resources/json/schema/entity/events/webhook.json

@@ -23,6 +23,20 @@
       "description": "Display Name that identifies this webhook.",
       "type": "string"
     },
+    "webhookType": {
+      "description": "Type of webhook slack,generic etc",
+      "type": "string",
+      "default": "generic",
+      "enum": ["slack", "generic"],
+      "javaEnums": [
+        {
+          "name": "slack"
+        },
+        {
+          "name": "generic"
+        }
+      ]
+    },
     "description": {
       "description": "Description of the application.",
       "$ref": "../../type/basic.json#/definitions/markdown"