evolvedbinary / elemental / 982

Committed 29 Apr 2025 08:34PM UTC coverage: 56.409% (+0.007%) from 56.402%

Build # 982

Build Type

push

circleci

Committed by

adamretter

Commit Message

[feature] Improve README.md badges

Run Details

28451 of 55847 branches covered (50.94%)

Branch coverage included in aggregate %.

77468 of 131924 relevant lines covered (58.72%)

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60.87

/exist-core/src/main/java/org/exist/util/io/FilterInputStreamCacheFactory.java

/*
 * Elemental
 * Copyright (C) 2024, Evolved Binary Ltd
 *
 * admin@evolvedbinary.com
 * https://www.evolvedbinary.com | https://www.elemental.xyz
 *
 * Use of this software is governed by the Business Source License 1.1
 * included in the LICENSE file and at www.mariadb.com/bsl11.
 *
 * Change Date: 2028-04-27
 *
 * On the date above, in accordance with the Business Source License, use
 * of this software will be governed by the Apache License, Version 2.0.
 *
 * Additional Use Grant: Production use of the Licensed Work for a permitted
 * purpose. A Permitted Purpose is any purpose other than a Competing Use.
 * A Competing Use means making the Software available to others in a commercial
 * product or service that: substitutes for the Software; substitutes for any
 * other product or service we offer using the Software that exists as of the
 * date we make the Software available; or offers the same or substantially
 * similar functionality as the Software.
 */
package org.exist.util.io;

import java.io.IOException;
import java.io.InputStream;
import java.lang.invoke.LambdaMetafactory;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.util.function.Function;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import static java.lang.invoke.MethodType.methodType;

/**
 * Factory to instantiate a cache object
 *
 * @author <a href="mailto:adam.retter@googlemail.com">Adam Retter</a>
 */
public class FilterInputStreamCacheFactory {

    private static final Logger LOG = LogManager.getLogger(FilterInputStreamCacheFactory.class);
    private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();

    public interface FilterInputStreamCacheConfiguration {
        String getCacheClass();
    }

    private FilterInputStreamCacheFactory() {
    }

    /**
     * Get a suitable Cache instance.
     *
     * @param cacheConfiguration the configuration for the cache
     * @param is the input stream to cache
     *
     * @return the cache instance
     *
     * @throws IOException if an error occurs setting up the cache
     */
    public static FilterInputStreamCache getCacheInstance(final FilterInputStreamCacheConfiguration cacheConfiguration, final InputStream is) throws IOException {
        final FilterInputStreamCache cache = new FilterInputStreamCacheFactory().instantiate(cacheConfiguration, is);
        if (cache == null) {
            throw new IOException("Could not load cache for class: " + cacheConfiguration.getCacheClass());
        }
        FilterInputStreamCacheMonitor.getInstance().register(cache);
        return cache;
    }

    private FilterInputStreamCache instantiate(final FilterInputStreamCacheConfiguration cacheConfiguration, final InputStream is) {
        try {
            final Class clazz = Class.forName(cacheConfiguration.getCacheClass());

            final MethodHandle methodHandle = LOOKUP.findConstructor(clazz, methodType(void.class, InputStream.class));

            final Function<InputStream, FilterInputStreamCache> constructor = (Function<InputStream, FilterInputStreamCache>)
                    LambdaMetafactory.metafactory(
                            LOOKUP, "apply", methodType(Function.class),
                            methodHandle.type().erase(), methodHandle, methodHandle.type()).getTarget().invokeExact();
            return constructor.apply(is);
        } catch (final Throwable e) {
            if (e instanceof InterruptedException) {
                // NOTE: must set interrupted flag
                Thread.currentThread().interrupt();
            }

            LOG.error(e.getMessage(), e);
            return null;
        }
    }
}

1	/*
2	* Elemental
3	* Copyright (C) 2024, Evolved Binary Ltd
4	*
5	* admin@evolvedbinary.com
6	* https://www.evolvedbinary.com \| https://www.elemental.xyz
7	*
8	* Use of this software is governed by the Business Source License 1.1
9	* included in the LICENSE file and at www.mariadb.com/bsl11.
10	*
11	* Change Date: 2028-04-27
12	*
13	* On the date above, in accordance with the Business Source License, use
14	* of this software will be governed by the Apache License, Version 2.0.
15	*
16	* Additional Use Grant: Production use of the Licensed Work for a permitted
17	* purpose. A Permitted Purpose is any purpose other than a Competing Use.
18	* A Competing Use means making the Software available to others in a commercial
19	* product or service that: substitutes for the Software; substitutes for any
20	* other product or service we offer using the Software that exists as of the
21	* date we make the Software available; or offers the same or substantially
22	* similar functionality as the Software.
23	*/
24	package org.exist.util.io;
25
26	import java.io.IOException;
27	import java.io.InputStream;
28	import java.lang.invoke.LambdaMetafactory;
29	import java.lang.invoke.MethodHandle;
30	import java.lang.invoke.MethodHandles;
31	import java.util.function.Function;
32
33	import org.apache.logging.log4j.LogManager;
34	import org.apache.logging.log4j.Logger;
35
36	import static java.lang.invoke.MethodType.methodType;
37
38	/**
39	* Factory to instantiate a cache object
40	*
41	* @author <a href="mailto:adam.retter@googlemail.com">Adam Retter</a>
42	*/
43	public class FilterInputStreamCacheFactory {
44
45	private static final Logger LOG = LogManager.getLogger(FilterInputStreamCacheFactory.class);	1✔
46	private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();	1✔
47
48	public interface FilterInputStreamCacheConfiguration {
49	String getCacheClass();
50	}
51
52	private FilterInputStreamCacheFactory() {
53	}
54
55	/**
56	* Get a suitable Cache instance.
57	*
58	* @param cacheConfiguration the configuration for the cache
59	* @param is the input stream to cache
60	*
61	* @return the cache instance
62	*
63	* @throws IOException if an error occurs setting up the cache
64	*/
65	public static FilterInputStreamCache getCacheInstance(final FilterInputStreamCacheConfiguration cacheConfiguration, final InputStream is) throws IOException {
66	final FilterInputStreamCache cache = new FilterInputStreamCacheFactory().instantiate(cacheConfiguration, is);	1✔
67	if (cache == null) {	1!
68	throw new IOException("Could not load cache for class: " + cacheConfiguration.getCacheClass());	×
69	}
70	FilterInputStreamCacheMonitor.getInstance().register(cache);	1✔
71	return cache;	1✔
72	}
73
74	private FilterInputStreamCache instantiate(final FilterInputStreamCacheConfiguration cacheConfiguration, final InputStream is) {
75	try {
76	final Class clazz = Class.forName(cacheConfiguration.getCacheClass());	1✔
77
78	final MethodHandle methodHandle = LOOKUP.findConstructor(clazz, methodType(void.class, InputStream.class));	1✔
79
80	final Function<InputStream, FilterInputStreamCache> constructor = (Function<InputStream, FilterInputStreamCache>)	1✔
81	LambdaMetafactory.metafactory(	1✔
82	LOOKUP, "apply", methodType(Function.class),	1✔
83	methodHandle.type().erase(), methodHandle, methodHandle.type()).getTarget().invokeExact();	1✔
84	return constructor.apply(is);	1✔
85	} catch (final Throwable e) {	×
86	if (e instanceof InterruptedException) {	×
87	// NOTE: must set interrupted flag
88	Thread.currentThread().interrupt();	×
89	}
90
91	LOG.error(e.getMessage(), e);	×
92	return null;	×
93	}
94	}
95	}

evolvedbinary / elemental / 982

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