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Separate json records into multiple messages (#40)
* implement JsonRecords object which parses json records type event into separate messages. * JsonRecords.java: make rv immutable; use try-with-resources with JsonReader Co-authored-by: Moonbow-1 <146731818+MoonBow-1@users.noreply.github.com> * comments for JsonRecords.java event passthroughs * make expected messages explicit * add EqualsVerifier and test for JsonRecords. --------- Co-authored-by: Moonbow-1 <146731818+MoonBow-1@users.noreply.github.com>
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113
src/main/java/com/teragrep/aer_02/json/JsonRecords.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| /* | ||
| * Teragrep Eventhub Reader as an Azure Function | ||
| * Copyright (C) 2024 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. | ||
| */ | ||
| package com.teragrep.aer_02.json; | ||
|
|
||
| import jakarta.json.*; | ||
| import jakarta.json.stream.JsonParsingException; | ||
|
|
||
| import java.io.StringReader; | ||
| import java.util.Objects; | ||
|
|
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| public final class JsonRecords { | ||
|
|
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| private final String event; | ||
|
|
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| public JsonRecords(final String event) { | ||
| this.event = event; | ||
| } | ||
|
|
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| /** | ||
| * Expects <code>{"records":[{},{}, ..., {}]}</code> type JSON string. | ||
| * | ||
| * @return individual records as an array or the original event. | ||
| */ | ||
| public String[] records() { | ||
| final String[] rv = new String[] { | ||
| event | ||
| }; | ||
|
|
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| final JsonStructure mainStructure; | ||
| try (final JsonReader reader = Json.createReader(new StringReader(event))) { | ||
| mainStructure = reader.read(); | ||
| } | ||
| catch (JsonParsingException e) { | ||
| // pass event through as-is if JSON parsing fails | ||
| return rv; | ||
| } | ||
|
|
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| final JsonValue recordsStructure = mainStructure.getValue("/records"); | ||
|
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| if (recordsStructure.getValueType().equals(JsonValue.ValueType.ARRAY)) { | ||
| final JsonArray recordsArray = recordsStructure.asJsonArray(); | ||
| String[] records = new String[recordsArray.size()]; | ||
|
|
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| for (int i = 0; i < recordsArray.size(); i++) { | ||
| // Take string representation of inner value regardless of actual datatype | ||
| records[i] = recordsArray.get(i).toString(); | ||
| } | ||
|
|
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| return records; | ||
| } | ||
|
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| // pass event through as-is if "records" is not an array type | ||
| return rv; | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) | ||
| return true; | ||
| if (o == null || getClass() != o.getClass()) | ||
| return false; | ||
| JsonRecords that = (JsonRecords) o; | ||
| return Objects.equals(event, that.event); | ||
| } | ||
|
|
||
| @Override | ||
| public int hashCode() { | ||
| return Objects.hashCode(event); | ||
| } | ||
| } |
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108
src/test/java/com/teragrep/aer_02/json/JsonRecordsTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * Teragrep Eventhub Reader as an Azure Function | ||
| * Copyright (C) 2024 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. | ||
| */ | ||
| package com.teragrep.aer_02.json; | ||
|
|
||
| import jakarta.json.Json; | ||
| import nl.jqno.equalsverifier.EqualsVerifier; | ||
| import org.junit.jupiter.api.Assertions; | ||
| import org.junit.jupiter.api.Test; | ||
|
|
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| public class JsonRecordsTest { | ||
|
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| @Test | ||
| void testRecordsAsObjectsCase() { | ||
| final String records = Json | ||
| .createObjectBuilder() | ||
| .add("records", Json.createArrayBuilder().add(Json.createObjectBuilder().add("a", "b")).add(Json.createObjectBuilder().add("c", "d"))).build().toString(); | ||
| JsonRecords jr = new JsonRecords(records); | ||
| final String[] result = jr.records(); | ||
| Assertions.assertEquals(2, result.length); | ||
| Assertions.assertEquals("{\"a\":\"b\"}", result[0]); | ||
| Assertions.assertEquals("{\"c\":\"d\"}", result[1]); | ||
| } | ||
|
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| @Test | ||
| void testRecordsAsStringsAndNumbersCase() { | ||
| final String records = Json | ||
| .createObjectBuilder() | ||
| .add("records", Json.createArrayBuilder().add("abc").add(123).build()) | ||
| .build() | ||
| .toString(); | ||
| JsonRecords jr = new JsonRecords(records); | ||
| final String[] result = jr.records(); | ||
| Assertions.assertEquals(2, result.length); | ||
| Assertions.assertEquals("\"abc\"", result[0]); | ||
| Assertions.assertEquals("123", result[1]); | ||
| } | ||
|
|
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| @Test | ||
| void testNonJsonRecordsCase() { | ||
| final String records = "{{]///...<>;"; | ||
| JsonRecords jr = new JsonRecords(records); | ||
| final String[] result = jr.records(); | ||
| Assertions.assertEquals(1, result.length); | ||
| Assertions.assertEquals("{{]///...<>;", result[0]); | ||
| } | ||
|
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| @Test | ||
| void testEquals() { | ||
| JsonRecords jr = new JsonRecords("{\"a\":\"b\",\"c\":\"d\"}"); | ||
| JsonRecords jr2 = new JsonRecords("{\"a\":\"b\",\"c\":\"d\"}"); | ||
| Assertions.assertEquals(jr, jr2); | ||
| } | ||
|
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| @Test | ||
| void testNotEquals() { | ||
| JsonRecords jr = new JsonRecords("{\"a\":\"b\",\"c\":\"d\"}"); | ||
| JsonRecords jr2 = new JsonRecords("{\"e\":\"f\",\"g\":\"h\"}"); | ||
| Assertions.assertNotEquals(jr, jr2); | ||
| } | ||
|
|
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| @Test | ||
| void testEqualsContract() { | ||
| EqualsVerifier.forClass(JsonRecords.class).verify(); | ||
| } | ||
| } |