add polling rule task

Issue-ID: HOLMES-56

Change-Id: I842ead880777b76da013834e5a25e10b0d8834bf
Signed-off-by: Shiwei Tian <tian.shiwei@zte.com.cn>

2 files changed, 123 insertions, 0 deletions

diff --git a/rulemgt/src/main/java/org/onap/holmes/rulemgt/RuleActiveApp.java b/rulemgt/src/main/java/org/onap/holmes/rulemgt/RuleActiveApp.java
index 003c7fb..a37c49c 100644
--- a/rulemgt/src/main/java/org/onap/holmes/rulemgt/RuleActiveApp.java
+++ b/rulemgt/src/main/java/org/onap/holmes/rulemgt/RuleActiveApp.java
@@ -21,11 +21,15 @@ import static jdk.nashorn.internal.runtime.regexp.joni.Config.log;
 import io.dropwizard.setup.Environment;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.holmes.common.config.MicroServiceConfig;
 import org.onap.holmes.common.dropwizard.ioc.bundle.IOCApplication;
 import org.onap.holmes.common.exception.CorrelationException;
 import org.onap.holmes.common.utils.MSBRegisterUtil;
+import org.onap.holmes.rulemgt.dcae.DaceConfigurationPolling;
 import org.onap.holmes.rulemgt.resources.RuleMgtResources;
 import org.onap.msb.sdk.discovery.entity.MicroServiceInfo;
 import org.onap.msb.sdk.discovery.entity.Node;
@@ -46,6 +50,10 @@ public class RuleActiveApp extends IOCApplication<RuleAppConfig> {
     public void run(RuleAppConfig configuration, Environment environment) throws Exception {
         super.run(configuration, environment);
 
+        ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();
+        service.scheduleAtFixedRate(new DaceConfigurationPolling("holmes-rule-mgmt"), 0,
+                DaceConfigurationPolling.POLLING_PERIOD, TimeUnit.MILLISECONDS);
+
         environment.jersey().register(new RuleMgtResources());
         try {
             new MSBRegisterUtil().register2Msb(createMicroServiceInfo());
diff --git a/rulemgt/src/main/java/org/onap/holmes/rulemgt/dcae/DaceConfigurationPolling.java b/rulemgt/src/main/java/org/onap/holmes/rulemgt/dcae/DaceConfigurationPolling.java
new file mode 100644
index 0000000..0527881
--- /dev/null
+++ b/rulemgt/src/main/java/org/onap/holmes/rulemgt/dcae/DaceConfigurationPolling.java
@@ -0,0 +1,115 @@
+/**
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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.onap.holmes.rulemgt.dcae;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.util.List;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.MediaType;
+import lombok.extern.slf4j.Slf4j;
+import org.glassfish.jersey.client.ClientConfig;
+import org.onap.holmes.common.config.MicroServiceConfig;
+import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
+import org.onap.holmes.common.dcae.entity.Rule;
+import org.onap.holmes.common.dcae.utils.DcaeConfigurationParser;
+import org.onap.holmes.common.exception.CorrelationException;
+import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
+import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
+import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
+
+@Slf4j
+public class DaceConfigurationPolling implements Runnable {
+
+    public static long POLLING_PERIOD = 10 * 1000;
+
+    private String hostname;
+
+    private String url = "http://127.0.0.1/api/holmes-rule-mgmt/v1/rule";
+
+    public DaceConfigurationPolling(String hostname) {
+        this.hostname = hostname;
+    }
+
+    @Override
+    public void run() {
+        DcaeConfigurations dcaeConfigurations = null;
+        try {
+            dcaeConfigurations = getDcaeConfigurations();
+        } catch (CorrelationException e) {
+            log.error("Failed to polling dcae configurations" + e.getMessage());
+        }
+        if (dcaeConfigurations != null) {
+            RuleQueryListResponse ruleQueryListResponse = getAllCorrelationRules();
+            List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
+            deleteAllCorrelationRules(ruleResult4APIs);
+            try {
+                addAllCorrelationRules(dcaeConfigurations);
+            } catch (CorrelationException e) {
+                log.error("Failed to add rules" + e.getMessage());
+            }
+        }
+    }
+
+    private DcaeConfigurations getDcaeConfigurations() throws CorrelationException {
+        String serviceAddrInfo = MicroServiceConfig.getServiceAddrInfoFromCBS(hostname);
+        DcaeConfigurations dcaeConfigurations = null;
+        dcaeConfigurations = DcaeConfigurationParser.parse(serviceAddrInfo);
+        return dcaeConfigurations;
+    }
+
+    private RuleQueryListResponse getAllCorrelationRules() {
+        Client client = ClientBuilder.newClient(new ClientConfig());
+        WebTarget webTarget = client.target(url);
+        return webTarget.request("application/json").get()
+                .readEntity(RuleQueryListResponse.class);
+    }
+
+    private void addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
+        for (Rule rule : dcaeConfigurations.getDefaultRules()) {
+            RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
+            Client client = ClientBuilder.newClient(new ClientConfig());
+            ObjectMapper mapper = new ObjectMapper();
+            String content = null;
+            try {
+                content = mapper.writeValueAsString(ruleCreateRequest);
+            } catch (JsonProcessingException e) {
+                throw new CorrelationException("Failed to convert the message object to a json string.", e);
+            }
+            WebTarget webTarget = client.target(url);
+            webTarget.request(MediaType.APPLICATION_JSON)
+                    .put(Entity.entity(content, MediaType.APPLICATION_JSON));
+        }
+    }
+
+    private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs){
+        ruleResult4APIs.forEach(correlationRule ->{
+            Client client = ClientBuilder.newClient(new ClientConfig());
+            WebTarget webTarget = client.target(url + "/" + correlationRule.getRuleId());
+            webTarget.request(MediaType.APPLICATION_JSON).delete();
+        });
+    }
+
+    private RuleCreateRequest getRuleCreateRequest(Rule rule) {
+        RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
+        ruleCreateRequest.setRuleName(rule.getName());
+        ruleCreateRequest.setContent(rule.getContents());
+        ruleCreateRequest.setDescription("");
+        ruleCreateRequest.setEnabled(1);
+        return ruleCreateRequest;
+    }
+}