diff options
Diffstat (limited to 'infra/translate-utils/src/main/java')
3 files changed, 179 insertions, 8 deletions
diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/CacheKeyFactory.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/CacheKeyFactory.java new file mode 100644 index 000000000..1b444ba3c --- /dev/null +++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/CacheKeyFactory.java @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * + * Licensed 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 io.fd.honeycomb.translate.util.read.cache; + +import javax.annotation.Nonnull; +import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; + +/** + * Provides keys for provided {@code InstanceIdentifier} + */ +public interface CacheKeyFactory { + + /** + * Construct key accordingly to provided {@code InstanceIdentifier<?>} + */ + String createKey(@Nonnull final InstanceIdentifier<?> actualContextIdentifier); +} diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/DumpCacheManager.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/DumpCacheManager.java index f5895038e..f1b265dec 100644 --- a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/DumpCacheManager.java +++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/DumpCacheManager.java @@ -30,6 +30,9 @@ import org.slf4j.LoggerFactory; /** * Manager responsible for returning Data object dumps<br> either from cache or by invoking specified {@link * EntityDumpExecutor} + * + * @param <T> Type of data returned by {@code EntityDumpExecutor},and stored cache + * @param <U> Type of dumping params */ public final class DumpCacheManager<T, U> { @@ -37,27 +40,29 @@ public final class DumpCacheManager<T, U> { private final EntityDumpExecutor<T, U> dumpExecutor; private final EntityDumpPostProcessingFunction<T> postProcessor; + private final CacheKeyFactory cacheKeyFactory; private DumpCacheManager(DumpCacheManagerBuilder<T, U> builder) { this.dumpExecutor = builder.dumpExecutor; this.postProcessor = builder.postProcessingFunction; + this.cacheKeyFactory = builder.cacheKeyFactory; } /** * Returns {@link Optional<T>} of dump * * @param identifier identifier for origin of dumping context - * @param entityKey key that defines scope for caching * @param cache modification cache of current transaction * @param dumpParams parameters to configure dump request * @throws ReadFailedException if execution of dumping request failed - * @returns If present in cache ,returns cached instance, if not, tries to dump data using provided executor, otherwise - * Optional.absent() + * @returns If present in cache ,returns cached instance, if not, tries to dump data using provided executor, + * otherwise Optional.absent() */ - public Optional<T> getDump(@Nonnull final InstanceIdentifier<?> identifier, @Nonnull String entityKey, - @Nonnull ModificationCache cache, final U dumpParams) + public Optional<T> getDump(@Nonnull final InstanceIdentifier<?> identifier, + @Nonnull final ModificationCache cache, final U dumpParams) throws ReadFailedException { + final String entityKey = this.cacheKeyFactory.createKey(identifier); // this key binding to every log has its logic ,because every customizer have its own cache manager and if // there is need for debugging/fixing some complex call with a lot of data,you can get lost in those logs LOG.debug("Loading dump for KEY[{}]", entityKey); @@ -81,29 +86,42 @@ public final class DumpCacheManager<T, U> { public static final class DumpCacheManagerBuilder<T, U> { + private static final CacheKeyFactory DEFAULT_CACHE_KEY_FACTORY_INSTANCE = new IdentifierCacheKeyFactory(); + private EntityDumpExecutor<T, U> dumpExecutor; private EntityDumpPostProcessingFunction<T> postProcessingFunction; + private CacheKeyFactory cacheKeyFactory; public DumpCacheManagerBuilder() { // for cases when user does not set specific post-processor postProcessingFunction = new NoopDumpPostProcessingFunction<T>(); + + //use no additional scopes version by default + cacheKeyFactory = DEFAULT_CACHE_KEY_FACTORY_INSTANCE; } - public DumpCacheManagerBuilder<T, U> withExecutor(@Nonnull EntityDumpExecutor<T, U> executor) { + public DumpCacheManagerBuilder<T, U> withExecutor(@Nonnull final EntityDumpExecutor<T, U> executor) { this.dumpExecutor = executor; return this; } public DumpCacheManagerBuilder<T, U> withPostProcessingFunction( - EntityDumpPostProcessingFunction<T> postProcessingFunction) { + @Nonnull final EntityDumpPostProcessingFunction<T> postProcessingFunction) { this.postProcessingFunction = postProcessingFunction; return this; } + public DumpCacheManagerBuilder<T, U> withCacheKeyFactory(@Nonnull final CacheKeyFactory cacheKeyFactory) { + this.cacheKeyFactory = cacheKeyFactory; + return this; + } + public DumpCacheManager<T, U> build() { checkNotNull(dumpExecutor, "Dump executor cannot be null"); checkNotNull(postProcessingFunction, - "Dump post-processor cannot be null cannot be null, default implementation is used if its not set"); + "Dump post-processor cannot be null cannot be null, default implementation is used when not set explicitly"); + checkNotNull(cacheKeyFactory, + "Cache key factory cannot be null, default non-extended implementation is used when not set explicitly"); return new DumpCacheManager<>(this); } diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/IdentifierCacheKeyFactory.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/IdentifierCacheKeyFactory.java new file mode 100644 index 000000000..51f47e137 --- /dev/null +++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/IdentifierCacheKeyFactory.java @@ -0,0 +1,122 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * + * Licensed 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 io.fd.honeycomb.translate.util.read.cache; + +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkNotNull; +import static org.opendaylight.yangtools.yang.binding.InstanceIdentifier.IdentifiableItem; + +import java.util.Collections; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; +import javax.annotation.Nonnull; +import org.opendaylight.yangtools.yang.binding.DataObject; +import org.opendaylight.yangtools.yang.binding.Identifiable; +import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; + +/** + * Factory providing cache keys to easier switching between scopes of caching + */ +public final class IdentifierCacheKeyFactory implements CacheKeyFactory { + + private static final String KEY_PARTS_SEPARATOR = "|"; + + // should be Set<Class<? extends DataObject & Identificable<?>>>, but that's not possible for wildcards + private final Set<Class<? extends DataObject>> additionalKeyTypes; + + /** + * Construct simple cache key factory + */ + public IdentifierCacheKeyFactory() { + this(Collections.emptySet()); + } + + /** + * @param additionalKeyTypes Additional types from path of cached type, that are specifying scope + */ + public IdentifierCacheKeyFactory(@Nonnull final Set<Class<? extends DataObject>> additionalKeyTypes) { + // verify that all are non-null and identifiable + this.additionalKeyTypes = checkNotNull(additionalKeyTypes, "Additional key types can't be null").stream() + .map(IdentifierCacheKeyFactory::verifyNotNull) + .map(IdentifierCacheKeyFactory::verifyIsIdentifiable) + .collect(Collectors.toSet()); + } + + @Override + public String createKey(@Nonnull final InstanceIdentifier<?> actualContextIdentifier) { + + checkNotNull(actualContextIdentifier, "Cannot construct key for null InstanceIdentifier"); + + // easiest case when only simple key is needed + if (additionalKeyTypes.isEmpty()) { + return actualContextIdentifier.getTargetType().toString(); + } + + checkArgument(isUniqueKeyConstructable(actualContextIdentifier), + "Unable to construct unique key, required key types : %s, provided paths : %s", additionalKeyTypes, + actualContextIdentifier.getPathArguments()); + + return String + .join(KEY_PARTS_SEPARATOR, additionalKeys(actualContextIdentifier), + actualContextIdentifier.getTargetType().toString()); + } + + /** + * Verifies that all requested key parts have keys + */ + private boolean isUniqueKeyConstructable(final InstanceIdentifier<?> actualContextIdentifier) { + return StreamSupport.stream(actualContextIdentifier.getPathArguments().spliterator(), false) + .filter(this::isAdditionalScope) + .filter(this::isIdentifiable) + .count() == additionalKeyTypes.size(); + } + + private boolean isAdditionalScope(final InstanceIdentifier.PathArgument pathArgument) { + return additionalKeyTypes.contains(pathArgument.getType()); + } + + private boolean isIdentifiable(final InstanceIdentifier.PathArgument pathArgument) { + return pathArgument instanceof IdentifiableItem; + } + + + private String additionalKeys(final InstanceIdentifier<?> actualContextIdentifier) { + return StreamSupport.stream(actualContextIdentifier.getPathArguments().spliterator(), false) + .filter(this::isAdditionalScope) + .filter(this::isIdentifiable) + .map(IdentifiableItem.class::cast) + .map(IdentifierCacheKeyFactory::bindKeyString) + .collect(Collectors.joining(KEY_PARTS_SEPARATOR)); + } + + private static String bindKeyString(IdentifiableItem identifiableItem) { + return String.format("%s[%s]", identifiableItem.getType().getTypeName(), identifiableItem.getKey()); + } + + private static Class<? extends DataObject> verifyNotNull(final Class<? extends DataObject> type) { + return checkNotNull(type, "Cannot use null as key"); + } + + /** + * Initial check if provided scope variables are identifiable aka. can be used to create unique cache key + */ + private static Class<? extends DataObject> verifyIsIdentifiable(final Class<? extends DataObject> type) { + checkArgument(Identifiable.class.isAssignableFrom(type), "Type %s is not Identifiable", type); + return type; + } +} |