add '| teragrep exec foreachbatch' with tests (#85)

src/main/antlr4/imports/COMMAND_TERAGREP_MODE.g4

@@ -80,6 +80,7 @@ COMMAND_TERAGREP_MODE_PORT: 'port' -> pushMode(COMMAND_TERAGREP_IP_MODE);
 COMMAND_TERAGREP_MODE_DOT: '.';
 COMMAND_TERAGREP_MODE_TOKENIZER: 'tokenizer';
 COMMAND_TERAGREP_MODE_REGEXEXTRACT: 'regexextract';
+COMMAND_TERAGREP_MODE_FOREACHBATCH: 'foreachbatch';
 COMMAND_TERAGREP_MODE_SYSLOG: 'syslog';
 COMMAND_TERAGREP_MODE_STREAM: 'stream';
 COMMAND_TERAGREP_MODE_LOAD: 'load';

src/main/antlr4/imports/DPLParserTransform_teragrep.g4

@@ -60,7 +60,12 @@ t_execParameter
         | t_bloomModeParameter
         | t_tokenizerParameter
         | t_regexextractParameter
-        | t_dynatraceParameter)
+        | t_dynatraceParameter
+        | t_forEachBatchParameter)
+        ;
+
+t_forEachBatchParameter
+        : COMMAND_TERAGREP_MODE_FOREACHBATCH
         ;
 
 t_dynatraceParameter

src/test/java/com/teragrep/pth_03/tests/TeragrepSyntaxTests.java

@@ -75,7 +75,9 @@ public class TeragrepSyntaxTests {
             "teragrep_hdfs_save_all_params",
             "teragrep_hdfs_save_codec",
             "teragrep_syslog_stream",
-            "teragrep_syslog_stream_host_port"
+            "teragrep_syslog_stream_host_port",
+            "teragrep_foreachbatch",
+            "teragrep_foreachbatch_transformStatement"
     })
     public void teragrepSyntaxParseTest(String arg) {
         String fileName = "src/test/resources/antlr4/commands/teragrep/" + arg + ".txt";
@@ -393,4 +395,36 @@ void testRegexExtractWithParams(String arg) {
         assertEquals(1, inputNodes.getLength());
         assertEquals(1, outputNodes.getLength());
     }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "teragrep_foreachbatch",
+    })
+    void testTeragrepForEachBatch(String arg) {
+        ParserStructureTestingUtility pstu = new ParserStructureTestingUtility();
+        String fileName = "src/test/resources/antlr4/commands/teragrep/" + arg + ".txt";
+
+        String febParamPath = "/root/transformStatement/teragrepTransformation/t_execParameter/t_forEachBatchParameter";
+        NodeList febParamNodes = Assertions.assertDoesNotThrow(() -> (NodeList) pstu.xpathQueryFile(fileName, febParamPath, false));
+
+        // Check that 1 found for each path
+        assertEquals(1, febParamNodes.getLength());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "teragrep_foreachbatch_transformStatement",
+    })
+    void testTeragrepForEachBatchWithTransformStatement(String arg) {
+        ParserStructureTestingUtility pstu = new ParserStructureTestingUtility();
+        String fileName = "src/test/resources/antlr4/commands/teragrep/" + arg + ".txt";
+
+        String febParamPath = "/root/transformStatement/teragrepTransformation/t_execParameter/t_forEachBatchParameter";
+        String transformStmtPath = "/root/transformStatement/transformStatement/statsTransformation";
+        NodeList febParamNodes = Assertions.assertDoesNotThrow(() -> (NodeList) pstu.xpathQueryFile(fileName, febParamPath, false));
+        NodeList transformStmtNodes = Assertions.assertDoesNotThrow(() -> (NodeList) pstu.xpathQueryFile(fileName, transformStmtPath, false));
+
+        assertEquals(1, febParamNodes.getLength());
+        assertEquals(1, transformStmtNodes.getLength());
+    }
 }

src/test/resources/antlr4/commands/teragrep/teragrep_foreachbatch.txt

@@ -0,0 +1,46 @@
+<!-- /*
+ * Teragrep Data Processing Language Parser Library PTH-03
+ * Copyright (C) 2019, 2020, 2021, 2022, 2023  Suomen Kanuuna Oy
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://github.com/teragrep/teragrep/blob/main/LICENSE>.
+ *
+ *
+ * Additional permission under GNU Affero General Public License version 3
+ * section 7
+ *
+ * If you modify this Program, or any covered work, by linking or combining it
+ * with other code, such other code is not for that reason alone subject to any
+ * of the requirements of the GNU Affero GPL version 3 as long as this Program
+ * is the same Program as licensed from Suomen Kanuuna Oy without any additional
+ * modifications.
+ *
+ * Supplemented terms under GNU Affero General Public License version 3
+ * section 7
+ *
+ * Origin of the software must be attributed to Suomen Kanuuna Oy. Any modified
+ * versions must be marked as "Modified version of" The Program.
+ *
+ * Names of the licensors and authors may not be used for publicity purposes.
+ *
+ * No rights are granted for use of trade names, trademarks, or service marks
+ * which are in The Program if any.
+ *
+ * Licensee must indemnify licensors and authors for any liability that these
+ * contractual assumptions impose on licensors and authors.
+ *
+ * To the extent this program is licensed as part of the Commercial versions of
+ * Teragrep, the applicable Commercial License may apply to this file if you as
+ * a licensee so wish it.
+ */ -->
+| teragrep exec foreachbatch

src/test/resources/antlr4/commands/teragrep/teragrep_foreachbatch_transformStatement.txt

@@ -0,0 +1,46 @@
+<!-- /*
+ * Teragrep Data Processing Language Parser Library PTH-03
+ * Copyright (C) 2019, 2020, 2021, 2022, 2023  Suomen Kanuuna Oy
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://github.com/teragrep/teragrep/blob/main/LICENSE>.
+ *
+ *
+ * Additional permission under GNU Affero General Public License version 3
+ * section 7
+ *
+ * If you modify this Program, or any covered work, by linking or combining it
+ * with other code, such other code is not for that reason alone subject to any
+ * of the requirements of the GNU Affero GPL version 3 as long as this Program
+ * is the same Program as licensed from Suomen Kanuuna Oy without any additional
+ * modifications.
+ *
+ * Supplemented terms under GNU Affero General Public License version 3
+ * section 7
+ *
+ * Origin of the software must be attributed to Suomen Kanuuna Oy. Any modified
+ * versions must be marked as "Modified version of" The Program.
+ *
+ * Names of the licensors and authors may not be used for publicity purposes.
+ *
+ * No rights are granted for use of trade names, trademarks, or service marks
+ * which are in The Program if any.
+ *
+ * Licensee must indemnify licensors and authors for any liability that these
+ * contractual assumptions impose on licensors and authors.
+ *
+ * To the extent this program is licensed as part of the Commercial versions of
+ * Teragrep, the applicable Commercial License may apply to this file if you as
+ * a licensee so wish it.
+ */ -->
+| teragrep exec foreachbatch | stats count(field) by anotherField