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[DO NOT MERGE!] SNOW-1176557 Support max lob size to 128MB in client SDK #877
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104 changes: 104 additions & 0 deletions
104
.../java/net/snowflake/ingest/streaming/example/SnowflakeStreamingIngestLargeLobExample.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,104 @@ | ||
| /* | ||
| * Copyright (c) 2021 Snowflake Computing Inc. All rights reserved. | ||
| */ | ||
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| package net.snowflake.ingest.streaming.example; | ||
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| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Paths; | ||
| import java.util.HashMap; | ||
| import java.util.Iterator; | ||
| import java.util.Map; | ||
| import java.util.Properties; | ||
| import net.snowflake.client.jdbc.internal.apache.tika.utils.StringUtils; | ||
| import net.snowflake.ingest.streaming.InsertValidationResponse; | ||
| import net.snowflake.ingest.streaming.OpenChannelRequest; | ||
| import net.snowflake.ingest.streaming.SnowflakeStreamingIngestChannel; | ||
| import net.snowflake.ingest.streaming.SnowflakeStreamingIngestClient; | ||
| import net.snowflake.ingest.streaming.SnowflakeStreamingIngestClientFactory; | ||
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| /** | ||
| * Example on how to use the Streaming Ingest client APIs. | ||
| * | ||
| * <p>Please read the README.md file for detailed steps | ||
| */ | ||
| public class SnowflakeStreamingIngestLargeLobExample { | ||
| // Please follow the example in profile_streaming.json.example to see the required properties, or | ||
| // if you have already set up profile.json with Snowpipe before, all you need is to add the "role" | ||
| // property. If the "role" is not specified, the default user role will be applied. | ||
| private static String PROFILE_PATH = "profile.json"; | ||
| private static final ObjectMapper mapper = new ObjectMapper(); | ||
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| public static void main(String[] args) throws Exception { | ||
| Properties props = new Properties(); | ||
| Iterator<Map.Entry<String, JsonNode>> propIt = | ||
| mapper.readTree(new String(Files.readAllBytes(Paths.get(PROFILE_PATH)))).fields(); | ||
| while (propIt.hasNext()) { | ||
| Map.Entry<String, JsonNode> prop = propIt.next(); | ||
| props.put(prop.getKey(), prop.getValue().asText()); | ||
| } | ||
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| // Create a streaming ingest client | ||
| try (SnowflakeStreamingIngestClient client = | ||
| SnowflakeStreamingIngestClientFactory.builder("MY_CLIENT").setProperties(props).build()) { | ||
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| // Create an open channel request on table MY_TABLE, note that the corresponding | ||
| // db/schema/table needs to be present | ||
| // Example: create or replace table MY_TABLE(c1 number); | ||
| OpenChannelRequest request1 = | ||
| OpenChannelRequest.builder("MY_CHANNEL") | ||
| .setDBName("MY_DATABASE") | ||
| .setSchemaName("MY_SCHEMA") | ||
| .setTableName("MY_TABLE") | ||
| .setOnErrorOption( | ||
| OpenChannelRequest.OnErrorOption.CONTINUE) // Another ON_ERROR option is ABORT | ||
| .build(); | ||
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| // Open a streaming ingest channel from the given client | ||
| SnowflakeStreamingIngestChannel channel1 = client.openChannel(request1); | ||
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| // Insert rows into the channel (Using insertRows API) | ||
| final int totalRowsInTable = 10; | ||
| for (int val = 0; val < totalRowsInTable; val++) { | ||
| Map<String, Object> row = new HashMap<>(); | ||
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| // large columns corresponds to the column name in table | ||
| row.put("c1", StringUtils.repeat("a", 127 * 1024 * 1024) + val); | ||
| row.put("c2", new byte[60 * 1024 * 1024]); | ||
| row.put("c3", "{\"a\":\"" + StringUtils.repeat("a", 127 * 1024 * 1024) + "\"}"); | ||
| row.put("c4", "{\"a\":\"" + StringUtils.repeat("a", 127 * 1024 * 1024) + "\"}"); | ||
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| // Insert the row with the current offset_token | ||
| InsertValidationResponse response = channel1.insertRow(row, String.valueOf(val)); | ||
| if (response.hasErrors()) { | ||
| // Simply throw if there is an exception, or you can do whatever you want with the | ||
| // erroneous row | ||
| throw response.getInsertErrors().get(0).getException(); | ||
| } | ||
| } | ||
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| // If needed, you can check the offset_token registered in Snowflake to make sure everything | ||
| // is committed | ||
| final int expectedOffsetTokenInSnowflake = totalRowsInTable - 1; // 0 based offset_token | ||
| final int maxRetries = 10; | ||
| int retryCount = 0; | ||
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| do { | ||
| String offsetTokenFromSnowflake = channel1.getLatestCommittedOffsetToken(); | ||
| if (offsetTokenFromSnowflake != null | ||
| && offsetTokenFromSnowflake.equals(String.valueOf(expectedOffsetTokenInSnowflake))) { | ||
| System.out.println("SUCCESSFULLY inserted " + totalRowsInTable + " rows"); | ||
| break; | ||
| } | ||
| retryCount++; | ||
| } while (retryCount < maxRetries); | ||
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| // Close the channel, the function internally will make sure everything is committed (or throw | ||
| // an exception if there is any issue) | ||
| channel1.close().get(); | ||
| } | ||
| } | ||
| } |
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@sfc-gh-tzhang do you know why in the past we have the parameter here, but the customer can not set it? Is there any explicit reason or just missing implementation? Thanks!