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[Client] java client support UnAvroBased Schema (#8246)
### Motivation JAVA client support UnAvroBasedSchema ### Modifications - `schema` division to **AvroBasedSchema** and **UnAvroBasedSchema** : AvroBased Schema | UnAvroBased Schema ------------ | ------------- StructSchema | AbstractStructSchema GenericSchemaImpl | AbstractGenericSchema - `GenericSchema` add `of()` method , `GenericSchemaImpl` and `StructSchema` continue to have for backward compatibility and only support AvroBased Schema 。
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pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/AbstractStructSchema.java
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| /** | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
| package org.apache.pulsar.client.impl.schema; | ||
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| import com.google.common.cache.CacheBuilder; | ||
| import com.google.common.cache.CacheLoader; | ||
| import com.google.common.cache.LoadingCache; | ||
| import io.netty.buffer.ByteBuf; | ||
| import io.netty.buffer.ByteBufInputStream; | ||
| import org.apache.avro.AvroTypeException; | ||
| import org.apache.commons.codec.binary.Hex; | ||
| import org.apache.commons.lang3.SerializationException; | ||
| import org.apache.pulsar.client.api.SchemaSerializationException; | ||
| import org.apache.pulsar.client.api.schema.SchemaInfoProvider; | ||
| import org.apache.pulsar.client.api.schema.SchemaReader; | ||
| import org.apache.pulsar.client.api.schema.SchemaWriter; | ||
| import org.apache.pulsar.common.protocol.schema.BytesSchemaVersion; | ||
| import org.apache.pulsar.common.schema.SchemaInfo; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * minimal abstract StructSchema | ||
| */ | ||
| public abstract class AbstractStructSchema<T> extends AbstractSchema<T> { | ||
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| protected static final Logger LOG = LoggerFactory.getLogger(AbstractStructSchema.class); | ||
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| protected SchemaInfo schemaInfo; | ||
| protected SchemaReader<T> reader; | ||
| protected SchemaWriter<T> writer; | ||
| protected SchemaInfoProvider schemaInfoProvider; | ||
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| LoadingCache<BytesSchemaVersion, SchemaReader<T>> readerCache = CacheBuilder.newBuilder().maximumSize(100000) | ||
| .expireAfterAccess(30, TimeUnit.MINUTES).build(new CacheLoader<BytesSchemaVersion, SchemaReader<T>>() { | ||
| @Override | ||
| public SchemaReader<T> load(BytesSchemaVersion schemaVersion) { | ||
| return loadReader(schemaVersion); | ||
| } | ||
| }); | ||
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| public AbstractStructSchema(SchemaInfo schemaInfo){ | ||
| this.schemaInfo = schemaInfo; | ||
| } | ||
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| @Override | ||
| public byte[] encode(T message) { | ||
| return writer.write(message); | ||
| } | ||
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| @Override | ||
| public T decode(byte[] bytes) { | ||
| return reader.read(bytes); | ||
| } | ||
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| @Override | ||
| public T decode(byte[] bytes, byte[] schemaVersion) { | ||
| try { | ||
| return schemaVersion == null ? decode(bytes) : | ||
| readerCache.get(BytesSchemaVersion.of(schemaVersion)).read(bytes); | ||
| } catch (ExecutionException | AvroTypeException e) { | ||
| if (e instanceof AvroTypeException) { | ||
| throw new SchemaSerializationException(e); | ||
| } | ||
| LOG.error("Can't get generic schema for topic {} schema version {}", | ||
| schemaInfoProvider.getTopicName(), Hex.encodeHexString(schemaVersion), e); | ||
| throw new RuntimeException("Can't get generic schema for topic " + schemaInfoProvider.getTopicName()); | ||
| } | ||
| } | ||
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| @Override | ||
| public T decode(ByteBuf byteBuf) { | ||
| return reader.read(new ByteBufInputStream(byteBuf)); | ||
| } | ||
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| @Override | ||
| public T decode(ByteBuf byteBuf, byte[] schemaVersion) { | ||
| try { | ||
| return schemaVersion == null ? decode(byteBuf) : | ||
| readerCache.get(BytesSchemaVersion.of(schemaVersion)).read(new ByteBufInputStream(byteBuf)); | ||
| } catch (ExecutionException e) { | ||
| LOG.error("Can't get generic schema for topic {} schema version {}", | ||
| schemaInfoProvider.getTopicName(), Hex.encodeHexString(schemaVersion), e); | ||
| throw new RuntimeException("Can't get generic schema for topic " + schemaInfoProvider.getTopicName()); | ||
| } | ||
| } | ||
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| @Override | ||
| public SchemaInfo getSchemaInfo() { | ||
| return this.schemaInfo; | ||
| } | ||
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| @Override | ||
| public void setSchemaInfoProvider(SchemaInfoProvider schemaInfoProvider) { | ||
| this.schemaInfoProvider = schemaInfoProvider; | ||
| } | ||
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| /** | ||
| * Load the schema reader for reading messages encoded by the given schema version. | ||
| * | ||
| * @param schemaVersion the provided schema version | ||
| * @return the schema reader for decoding messages encoded by the provided schema version. | ||
| */ | ||
| protected abstract SchemaReader<T> loadReader(BytesSchemaVersion schemaVersion); | ||
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| /** | ||
| * TODO: think about how to make this async | ||
| */ | ||
| protected SchemaInfo getSchemaInfoByVersion(byte[] schemaVersion) { | ||
| try { | ||
| return schemaInfoProvider.getSchemaByVersion(schemaVersion).get(); | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| throw new SerializationException( | ||
| "Interrupted at fetching schema info for " + SchemaUtils.getStringSchemaVersion(schemaVersion), | ||
| e | ||
| ); | ||
| } catch (ExecutionException e) { | ||
| throw new SerializationException( | ||
| "Failed at fetching schema info for " + SchemaUtils.getStringSchemaVersion(schemaVersion), | ||
| e.getCause() | ||
| ); | ||
| } | ||
| } | ||
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| protected void setWriter(SchemaWriter<T> writer) { | ||
| this.writer = writer; | ||
| } | ||
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| protected void setReader(SchemaReader<T> reader) { | ||
| this.reader = reader; | ||
| } | ||
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| protected SchemaReader<T> getReader() { | ||
| return reader; | ||
| } | ||
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| } |
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