ATEST-81:

- implementing dummy write method for manual testing

src/main/java/ch/psi/daq/rest/RestApplication.java

@@ -7,8 +7,8 @@ import org.springframework.boot.context.web.SpringBootServletInitializer;
 import org.springframework.context.annotation.ComponentScan;
 
 /**
- * Entry point to our rest-frontend of the Swissfel application which most importantly wires all the @RestController
- * annotated classes.
+ * Entry point to our rest-frontend of the data acquisition (DAQ) application which most importantly
+ * wires all the @RestController annotated classes.
  * <p>
  * 
  * This acts as a @Configuration class for Spring. As such it has @ComponentScan annotation that

src/main/java/ch/psi/daq/rest/config/RestConfig.java

@@ -24,8 +24,6 @@ import com.hazelcast.spring.context.SpringManagedContext;
 import ch.psi.daq.common.statistic.StorelessStatistics;
 import ch.psi.daq.domain.cassandra.ChannelEvent;
 import ch.psi.daq.hazelcast.config.HazelcastConfig;
-import ch.psi.daq.hazelcast.query.processor.QueryProcessor;
-import ch.psi.daq.hazelcast.query.processor.cassandra.CassandraQueryProcessorDistributed;
 import ch.psi.daq.rest.ResponseStreamWriter;
 import ch.psi.daq.rest.model.PropertyFilterMixin;
 
@@ -36,13 +34,20 @@ public class RestConfig {
 
    private static final Logger logger = LoggerFactory.getLogger(RestConfig.class);
    
+   // TODO refactor - also defined in HazelcastNodeConfig
+   private static final String HAZELCAST_GROUP_PASSWORD = "hazelcast.group.password";
+   private static final String HAZELCAST_GROUP_NAME = "hazelcast.group.name";
+   
    @Autowired
    private Environment env;
    
-   @Bean
-   public QueryProcessor queryProcessor() {
-      return new CassandraQueryProcessorDistributed();
-   }
+   // a nested configuration
+   // this guarantees that the ordering of the properties file is as expected
+   // see:
+   // https://jira.spring.io/browse/SPR-10409?focusedCommentId=101393&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-101393
+   // @Configuration
+   // @Import(CassandraConfig.class)
+   // static class InnerConfiguration { }
    
    @Bean
    public JsonFactory jsonFactory() {
@@ -63,7 +68,16 @@ public class RestConfig {
       ClientConfig config = new ClientConfig();
       config.setManagedContext(managedContext());
 
-      config.getNetworkConfig().setAddresses(hazelcastMembers());
+      config.getNetworkConfig().setAddresses(hazelcastInitialCandidates());
+      
+      String groupName = env.getProperty(HAZELCAST_GROUP_NAME);
+      if (groupName != null) {
+         config.getGroupConfig().setName(groupName);
+      }
+      String groupPassword = env.getProperty(HAZELCAST_GROUP_PASSWORD);
+      if (groupPassword != null) {
+         config.getGroupConfig().setPassword(groupPassword);
+      }
 
       return config;
    }
@@ -73,8 +87,7 @@ public class RestConfig {
       return new SpringManagedContext();
    }
 
-   @Bean
-   public List<String> hazelcastMembers() {
+   private List<String> hazelcastInitialCandidates() {
       List<String> clusterMembers = Arrays.asList(StringUtils.commaDelimitedListToStringArray(env.getProperty("hazelcast.initialcandidates")));
       logger.info("The following hosts have been defined to form a Hazelcast cluster: {}", clusterMembers);
       return clusterMembers;
@@ -92,11 +105,4 @@ public class RestConfig {
       return mapper;
    }
 
-   // a nested configuration
-   // this guarantees that the ordering of the properties file is as expected
-   // see:
-   // https://jira.spring.io/browse/SPR-10409?focusedCommentId=101393&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-101393
-   // @Configuration
-   // @Import(CassandraConfig.class)
-   // static class InnerConfiguration { }
 }

src/main/java/ch/psi/daq/rest/controller/DaqRestController.java

@@ -1,9 +1,15 @@
 package ch.psi.daq.rest.controller;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
 import java.util.Map;
-import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.function.LongFunction;
+import java.util.function.LongUnaryOperator;
+import java.util.stream.Collectors;
+import java.util.stream.LongStream;
 import java.util.stream.Stream;
 
 import javax.servlet.http.HttpServletResponse;
@@ -11,11 +17,13 @@ import javax.servlet.http.HttpServletResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.util.Assert;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 import ch.psi.daq.cassandra.writer.CassandraWriter;
+import ch.psi.daq.domain.DataType;
 import ch.psi.daq.domain.cassandra.ChannelEvent;
 import ch.psi.daq.domain.cassandra.DataEvent;
 import ch.psi.daq.hazelcast.query.processor.QueryProcessor;
@@ -39,7 +47,6 @@ public class DaqRestController {
    private QueryProcessor queryProcessor;
 
    
-   
    @RequestMapping(value = "/pulserange")
    public void pulseRange(@RequestBody PulseRangeQuery query, HttpServletResponse res) throws IOException {
 
@@ -71,20 +78,68 @@ public class DaqRestController {
       responseStreamWriter.respond(flatStreams, query, res);
    }
 
-
+   // ==========================================================================================
+   // TODO this is simply a method for initial / rudimentary testing - remove once further evolved
    @RequestMapping(value = "/write")
-   public void writeDummyEntry() {
-      int pulseId = 100;
-      ChannelEvent event = new ChannelEvent(
-            "dummy-test",
-            pulseId,
-            0,
-            pulseId,
-            pulseId,
-            0,
-            "data_" + UUID.randomUUID().toString());
+   public long writeDummyEntry() {
       
-      CompletableFuture<Void> future = cassandraWriter.writeAsync(3, 0, event);
+      long startIndex = System.currentTimeMillis();
+      
+      writeData(3,startIndex, 100, new String[]{"channel1", "channel2"});
+      
+      return startIndex;
+   }
+   
+   private void writeData(int dataReplication, long startIndex, long nrOfElements,
+         String... channelNames) {
+      writeData(dataReplication, startIndex, nrOfElements,
+            i -> 2 * i,
+            i -> 2 * i,
+            i -> 2 * i,
+            i -> 2 * i,
+            i -> 2 * i,
+            i -> Long.valueOf(2 * i),
+            channelNames);
+   }
+   
+   private <T> void writeData(int dataReplication, long startIndex, long nrOfElements,
+         LongUnaryOperator iocMillis, LongUnaryOperator iocNanos, LongUnaryOperator pulseIds,
+         LongUnaryOperator globalMillis, LongUnaryOperator globalNanos, LongFunction<T> valueFunction,
+         String... channelNames) {
+      
+      Assert.notNull(channelNames);
+
+      CompletableFuture<Void> future;
+
+      List<ChannelEvent> events =
+            Arrays.stream(channelNames)
+                  .parallel()
+                  .flatMap(
+                        channelName -> {
+                           Stream<ChannelEvent> stream =
+                                 LongStream
+                                       .range(startIndex, startIndex + nrOfElements)
+                                       .parallel()
+                                       .mapToObj(
+                                             i -> {
+                                                Object value = valueFunction.apply(i);
+                                                return new ChannelEvent(channelName,
+                                                      iocMillis.applyAsLong(i),
+                                                      iocNanos.applyAsLong(i),
+                                                      pulseIds.applyAsLong(i),
+                                                      globalMillis.applyAsLong(i),
+                                                      globalNanos.applyAsLong(i),
+                                                      value,
+                                                      DataType.getTypeName(value.getClass())
+                                                );
+                                             }
+                                       );
+
+                           return stream;
+                        })
+                  .collect(Collectors.toList());
+
+      future = cassandraWriter.writeAsync(dataReplication, (int) TimeUnit.HOURS.toSeconds(1), events);
       future.join();
    }
 }

src/main/resources/rest.properties

@@ -4,3 +4,7 @@ server.port=8080
 # defines the list of hosts who are tried for an initial connection to the cluster
 #hazelcast.members=sf-nube-11.psi.ch,sf-nube-12.psi.ch,sf-nube-13.psi.ch,sf-nube-14.psi.ch
 hazelcast.initialcandidates=localhost
+
+# defines the cluster group and its password
+hazelcast.group.name=QueryCluster
+hazelcast.group.password=d9zT5h*4!KAHesxdnDm7