Github user vesense commented on a diff in the pull request:
https://github.com/apache/storm/pull/1783#discussion_r89250230
--- Diff:
external/storm-hbase/src/main/java/org/apache/storm/hbase/bolt/HBaseLookupBolt.java
---
@@ -40,51 +48,81 @@
*
*/
public class HBaseLookupBolt extends AbstractHBaseBolt {
- private static final Logger LOG =
LoggerFactory.getLogger(HBaseLookupBolt.class);
+
+ private static final long serialVersionUID = 1L;
+ private static final Logger LOG =
LoggerFactory.getLogger(HBaseLookupBolt.class);
+
+ private HBaseValueMapper rowToTupleMapper;
+ private HBaseProjectionCriteria projectionCriteria;
+ private transient LoadingCache<byte[], Result> cache;
+ private transient boolean cacheEnabled;
- private HBaseValueMapper rowToTupleMapper;
+ public HBaseLookupBolt(String tableName, HBaseMapper mapper,
HBaseValueMapper rowToTupleMapper) {
+ super(tableName, mapper);
+ Validate.notNull(rowToTupleMapper, "rowToTupleMapper can not be
null");
+ this.rowToTupleMapper = rowToTupleMapper;
+ }
- private HBaseProjectionCriteria projectionCriteria;
+ public HBaseLookupBolt withConfigKey(String configKey) {
+ this.configKey = configKey;
+ return this;
+ }
- public HBaseLookupBolt(String tableName, HBaseMapper mapper,
HBaseValueMapper rowToTupleMapper){
- super(tableName, mapper);
- Validate.notNull(rowToTupleMapper, "rowToTupleMapper can not be
null");
- this.rowToTupleMapper = rowToTupleMapper;
- }
+ public HBaseLookupBolt withProjectionCriteria(HBaseProjectionCriteria
projectionCriteria) {
+ this.projectionCriteria = projectionCriteria;
+ return this;
+ }
- public HBaseLookupBolt withConfigKey(String configKey){
- this.configKey = configKey;
- return this;
- }
+ @SuppressWarnings({ "unchecked", "rawtypes" })
+ @Override
+ public void prepare(Map config, TopologyContext topologyContext,
OutputCollector collector) {
+ super.prepare(config, topologyContext, collector);
+ cacheEnabled =
Boolean.parseBoolean(config.getOrDefault("hbase.cache.enable",
"false").toString());
+ int cacheTTL =
Integer.parseInt(config.getOrDefault("hbase.cache.ttl.seconds",
"300").toString());
+ int maxCacheSize =
Integer.parseInt(config.getOrDefault("hbase.cache.size", "1000").toString());
+ if (cacheEnabled) {
+ cache = Caffeine.newBuilder()
+
.maximumSize(maxCacheSize).expireAfterWrite(cacheTTL, TimeUnit.SECONDS)
+ .build(new CacheLoader<byte[], Result>() {
- public HBaseLookupBolt withProjectionCriteria(HBaseProjectionCriteria
projectionCriteria) {
- this.projectionCriteria = projectionCriteria;
- return this;
- }
+ @Override
+ public Result load(byte[] rowKey) throws Exception {
+ Get get = hBaseClient.constructGetRequests(rowKey,
projectionCriteria);
+ LOG.debug("Cache miss for key:"+new String(rowKey));
--- End diff --
@ambud
It would be better to use `Cache miss for key: {}` instead of `+`. After
fixing this, you can squash commits into one.
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