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https://issues.apache.org/jira/browse/BEAM-5445?focusedWorklogId=150412&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-150412
]
ASF GitHub Bot logged work on BEAM-5445:
----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Oct/18 15:15
Start Date: 02/Oct/18 15:15
Worklog Time Spent: 10m
Work Description: nielm commented on a change in pull request #6478:
[BEAM-5445] [BEAM-4796] SpannerIO: Only batch on the current bundle. Adds
streaming support
URL: https://github.com/apache/beam/pull/6478#discussion_r221993914
##########
File path:
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java
##########
@@ -1074,59 +1061,61 @@ public void setup() {
batch = ImmutableList.builder();
batchSizeBytes = 0;
batchCells = 0;
- spannerAccessor = spannerConfig.connectToSpanner();
- }
-
- @Teardown
- public void teardown() {
- spannerAccessor.close();
}
@ProcessElement
public void processElement(ProcessContext c) throws Exception {
SpannerSchema spannerSchema = c.sideInput(schemaView);
- MutationGroupEncoder mutationGroupEncoder = new
MutationGroupEncoder(spannerSchema);
- KV<String, Iterable<SerializedMutation>> element = c.element();
- for (SerializedMutation kv : element.getValue()) {
- byte[] value = kv.getMutationGroupBytes();
- MutationGroup mg = mutationGroupEncoder.decode(value);
+ // Iterate through list, outputting whenever a batch is complete.
+ for (KV<byte[], byte[]> kv : c.element()) {
+ MutationGroup mg = decode(kv.getValue());
+
long groupSize = MutationSizeEstimator.sizeOf(mg);
long groupCells = MutationCellCounter.countOf(spannerSchema, mg);
- if (batchCells + groupCells > maxNumMutations
- || batchSizeBytes + groupSize > maxBatchSizeBytes) {
- ImmutableList<MutationGroup> mutations = batch.build();
- c.output(mutations);
- batch = ImmutableList.builder();
- batchSizeBytes = 0;
- batchCells = 0;
+ if (((batchCells + groupCells) > maxNumMutations)
+ || ((batchSizeBytes + groupSize) > maxBatchSizeBytes)) {
+ outputBatch(c);
Review comment:
Beam docs make no comment about whether DoFns should be thread-safe or not,
but adding synchronized blocks does not harm.
GatherBundleAndSortFn has been updated to be thread-safe.
BatchFn has been re-written to use local variables only so is now
thread-safe.
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Issue Time Tracking
-------------------
Worklog Id: (was: 150412)
Time Spent: 2h 50m (was: 2h 40m)
> Update SpannerIO to support unbounded writes
> --------------------------------------------
>
> Key: BEAM-5445
> URL: https://issues.apache.org/jira/browse/BEAM-5445
> Project: Beam
> Issue Type: Improvement
> Components: io-java-gcp
> Reporter: Chamikara Jayalath
> Priority: Major
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> Currently, due to a known issue, streaming pipelines that use SpannerIO.Write
> do not actually write to Spanner.
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