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elide-core/src/main/java/com/yahoo/elide/core/datastore/inmemory/HashMapDataStore.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /* | ||
| * Copyright 2017, Yahoo Inc. | ||
| * Licensed under the Apache License, Version 2.0 | ||
| * See LICENSE file in project root for terms. | ||
| */ | ||
| package com.yahoo.elide.core.datastore.inmemory; | ||
|
|
||
| import com.yahoo.elide.core.DataStore; | ||
| import com.yahoo.elide.core.DataStoreTransaction; | ||
| import com.yahoo.elide.core.EntityDictionary; | ||
|
|
||
| import org.reflections.Reflections; | ||
| import org.reflections.scanners.SubTypesScanner; | ||
| import org.reflections.scanners.TypeAnnotationsScanner; | ||
| import org.reflections.util.ClasspathHelper; | ||
| import org.reflections.util.ConfigurationBuilder; | ||
|
|
||
| import lombok.Getter; | ||
|
|
||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
|
|
||
| import javax.persistence.Entity; | ||
|
|
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| /** | ||
| * Simple in-memory only database. | ||
| */ | ||
| public class HashMapDataStore implements DataStore { | ||
| private final Map<Class<?>, Map<String, Object>> dataStore = Collections.synchronizedMap(new HashMap<>()); | ||
| @Getter private EntityDictionary dictionary; | ||
| @Getter private final Package beanPackage; | ||
| @Getter private final ConcurrentHashMap<Class<?>, AtomicLong> typeIds = new ConcurrentHashMap<>(); | ||
|
|
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| public HashMapDataStore(Package beanPackage) { | ||
| this.beanPackage = beanPackage; | ||
| } | ||
|
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| @Override | ||
| public void populateEntityDictionary(EntityDictionary dictionary) { | ||
| Reflections reflections = new Reflections(new ConfigurationBuilder() | ||
| .addUrls(ClasspathHelper.forPackage(beanPackage.getName())) | ||
| .setScanners(new SubTypesScanner(), new TypeAnnotationsScanner())); | ||
| reflections.getTypesAnnotatedWith(Entity.class).stream() | ||
| .filter(entityAnnotatedClass -> entityAnnotatedClass.getPackage().getName() | ||
| .startsWith(beanPackage.getName())) | ||
| .forEach((cls) -> { | ||
| dictionary.bindEntity(cls); | ||
| dataStore.put(cls, Collections.synchronizedMap(new LinkedHashMap<>())); | ||
| }); | ||
| this.dictionary = dictionary; | ||
| } | ||
|
|
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| @Override | ||
| public DataStoreTransaction beginTransaction() { | ||
| return new HashMapStoreTransaction(dataStore, dictionary, typeIds); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| StringBuilder sb = new StringBuilder(); | ||
| sb.append("Data store contents "); | ||
| for (Class<?> cls : dataStore.keySet()) { | ||
| sb.append("\n Table ").append(cls).append(" contents \n"); | ||
| Map<String, Object> data = dataStore.get(cls); | ||
| for (Map.Entry<String, Object> e : data.entrySet()) { | ||
| sb.append(" Id: ").append(e.getKey()).append(" Value: ").append(e.getValue()); | ||
| } | ||
| } | ||
| return sb.toString(); | ||
| } | ||
| } |
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