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Merge pull request #17 from SolumXplain/SXSD-6480-remove-static-refdata
SXSD-6480: Remove reference to ReferenceData.standard() from customised classes.
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130 changes: 130 additions & 0 deletions
130
modules/basics/src/main/java/com/opengamma/strata/basics/ReferenceDataHolder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| * Copyright (C) 2023 - present by OpenGamma Inc. and the OpenGamma group of companies | ||
| * | ||
| * Please see distribution for license. | ||
| */ | ||
| package com.opengamma.strata.basics; | ||
|
|
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| import java.util.function.Supplier; | ||
|
|
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import com.opengamma.strata.collect.ArgChecker; | ||
|
|
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| /** | ||
| * Associates {@link ReferenceData} with the current execution thread. | ||
| * <p> | ||
| * This class provides a series of static methods that delegate to {@link InheritableThreadLocalReferenceDataHolderStrategy}. | ||
| * This strategy uses an {@link InheritableThreadLocal} to store {@code ReferenceData} against a thread. | ||
| * | ||
| * </p> | ||
| */ | ||
| public class ReferenceDataHolder { | ||
| private ReferenceDataHolder() { | ||
| // prevent instantiation | ||
| } | ||
|
|
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| private static final InheritableThreadLocalReferenceDataHolderStrategy STRATEGY = new InheritableThreadLocalReferenceDataHolderStrategy(); | ||
|
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| /** | ||
| * Sets the current reference data for this thread. | ||
| * | ||
| * @param refData the new value to hold (should never be null). | ||
| * @throws IllegalArgumentException if {@code refData} is null. | ||
| */ | ||
| public static void setReferenceData(ReferenceData refData) { | ||
| ArgChecker.notNull(refData, "refData"); | ||
| STRATEGY.setReferenceData(refData); | ||
| } | ||
|
|
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| /** | ||
| * Gets the current reference data for this thread. | ||
| * If it has not previously been set for this thread then it will be null. | ||
| * | ||
| * @return current reference data | ||
| */ | ||
| public static ReferenceData getReferenceData() { | ||
| return STRATEGY.getReferenceData(); | ||
| } | ||
|
|
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| /** | ||
| * Gets the current reference data for this thread and, if it is not set, return a fallback value instead. | ||
| * | ||
| * @param other the fallback value to return if the reference data has not been set for this thread (should never be null). | ||
| * @return the reference data for this thread, or the provided fallback value | ||
| * @throws IllegalArgumentException if {@code other} is null. | ||
| */ | ||
| public static ReferenceData getReferenceDataWithFallback(ReferenceData other) { | ||
| ArgChecker.notNull(other, "other"); | ||
| return STRATEGY.getReferenceDataWithFallback(other); | ||
| } | ||
|
|
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| /** | ||
| * Executes a function to return a value with reference data set for the duration of the function and then | ||
| * cleared afterwards. | ||
| * | ||
| * @param referenceData the new value to hold (should never be null). | ||
| * @param fn the function to call to return a value | ||
| * @return the value returned from the function | ||
| * @param <T> type of value | ||
| */ | ||
| public static <T> T withReferenceData(ReferenceData referenceData, Supplier<T> fn) { | ||
| setReferenceData(referenceData); | ||
| try { | ||
| T result = fn.get(); | ||
| return result; | ||
| } finally { | ||
| clearReferenceData(); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Executes a function that returns no value with reference data set for the duration of the function and then | ||
| * cleared afterwards. | ||
| * | ||
| * @param referenceData the new value to hold (should never be null). | ||
| * @param fn the function to call | ||
| */ | ||
| public static void withReferenceData(ReferenceData referenceData, Runnable fn) { | ||
| setReferenceData(referenceData); | ||
| try { | ||
| fn.run(); | ||
| } finally { | ||
| clearReferenceData(); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Clears the current reference data for this thread. | ||
| */ | ||
| public static void clearReferenceData() { | ||
| STRATEGY.clearReferenceData(); | ||
| } | ||
|
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| private static class InheritableThreadLocalReferenceDataHolderStrategy { | ||
| private Logger log = LoggerFactory.getLogger(ReferenceDataHolder.class); | ||
| private static final ThreadLocal<ReferenceData> HOLDER = new InheritableThreadLocal<>(); | ||
|
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| public void clearReferenceData() { | ||
| HOLDER.remove(); | ||
| } | ||
|
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| public ReferenceData getReferenceData() { | ||
| return HOLDER.get(); | ||
| } | ||
|
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| public void setReferenceData(ReferenceData refData) { | ||
| HOLDER.set(refData); | ||
| } | ||
|
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| public ReferenceData getReferenceDataWithFallback(ReferenceData other) { | ||
| final ReferenceData result = getReferenceData(); | ||
| if (result == null) { | ||
| log.warn("No reference data saved in thread, falling back to default."); | ||
| return other; | ||
| } | ||
| return result; | ||
| } | ||
| } | ||
| } |
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