Github user cestella commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/242#discussion_r78433046
--- Diff:
metron-analytics/metron-profiler-client/src/main/java/org/apache/metron/profiler/client/stellar/GetProfile.java
---
@@ -0,0 +1,179 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.apache.metron.profiler.client.stellar;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.hadoop.hbase.client.HTableInterface;
+import org.apache.metron.common.dsl.Context;
+import org.apache.metron.common.dsl.ParseException;
+import org.apache.metron.common.dsl.Stellar;
+import org.apache.metron.common.dsl.StellarFunction;
+import org.apache.metron.common.utils.ConversionUtils;
+import org.apache.metron.profiler.client.HBaseProfilerClient;
+import org.apache.metron.profiler.client.ProfilerClient;
+import org.apache.metron.profiler.hbase.ColumnBuilder;
+import org.apache.metron.profiler.hbase.RowKeyBuilder;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static java.lang.String.format;
+import static
org.apache.metron.common.dsl.Context.Capabilities.PROFILER_COLUMN_BUILDER;
+import static
org.apache.metron.common.dsl.Context.Capabilities.PROFILER_HBASE_TABLE;
+import static
org.apache.metron.common.dsl.Context.Capabilities.PROFILER_ROW_KEY_BUILDER;
+
+/**
+ * A Stellar function that can retrieve data contained within a Profile.
+ *
+ * PROFILE_GET
+ *
+ * Retrieve all values for 'entity1' from 'profile1' over the past 4 hours.
+ *
+ * <code>PROFILE_GET('profile1', 'entity1', 4, 'HOURS')</code>
+ *
+ * Retrieve all values for 'entity1' from 'profile1' over the past 2 days.
+ *
+ * <code>PROFILE_GET('profile1', 'entity1', 2, 'DAYS')</code>
+ *
+ * Retrieve all values for 'entity1' from 'profile1' that occurred on
'weekdays' over the past month.
+ *
+ * <code>PROFILE_GET('profile1', 'entity1', 1, 'MONTHS',
'weekdays')</code>
+ *
+ */
+@Stellar(
+ namespace="PROFILE",
+ name="GET",
+ description="Retrieves a series of values from a stored profile.",
+ params={
+ "profile - The name of the profile.",
+ "entity - The name of the entity.",
+ "durationAgo - How long ago should values be retrieved from?",
+ "units - The units of 'durationAgo'.",
+ "groups - Optional - The groups used to sort the profile."
+ },
+ returns="The profile measurements."
+)
+public class GetProfile implements StellarFunction {
+
+ private ProfilerClient client;
+
+ /**
+ * Initialization.
+ */
+ @Override
+ public void initialize(Context context) {
+
+ Context.Capabilities[] required = { PROFILER_HBASE_TABLE,
PROFILER_ROW_KEY_BUILDER, PROFILER_COLUMN_BUILDER };
+ validateContext(context, required);
+
+ HTableInterface table = (HTableInterface)
context.getCapability(PROFILER_HBASE_TABLE).get();
+ RowKeyBuilder rowKeyBuilder = (RowKeyBuilder)
context.getCapability(PROFILER_ROW_KEY_BUILDER).get();
+ ColumnBuilder columnBuilder = (ColumnBuilder)
context.getCapability(PROFILER_COLUMN_BUILDER).get();
+
+ client = new HBaseProfilerClient(table, rowKeyBuilder, columnBuilder);
+ }
+
+ /**
+ * Is the function initialized?
+ */
+ @Override
+ public boolean isInitialized() {
+ return client != null;
+ }
+
+ /**
+ * Apply the function.
+ * @param args The function arguments.
+ * @param context
+ */
+ @Override
+ public Object apply(List<Object> args, Context context) throws
ParseException {
+
+ String profile = getArg(0, String.class, args);
+ String entity = getArg(1, String.class, args);
+ long durationAgo = getArg(2, Long.class, args);
+ String unitsName = getArg(3, String.class, args);
+ TimeUnit units = TimeUnit.valueOf(unitsName);
+ List<Object> groups = getGroupsArg(4, args);
+
+ return client.fetch(profile, entity, durationAgo, units,
Integer.class, groups);
--- End diff --
What is hard coded as an integer? The argument index (e.g. `getArg(i,
...)`)?
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