GH-882: Add support for loading native library from a user specified location#883

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Merged
lidavidm merged 1 commit into from
Oct 27, 2025
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GH-882: Add support for loading native library from a user specified location #883

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19 changes: 17 additions & 2 deletions c/src/main/java/org/apache/arrow/c/jni/JniLoader.java
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
}

private void load(String name) {
final String libraryToLoad =
name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
String libraryName = System.mapLibraryName(name);

// If 'arrow.cdata.library.path' is defined, try to load the native library from there
String libraryPath = System.getProperty("arrow.cdata.library.path");
if (libraryPath != null) {
try {
File libraryFile = new File(libraryPath, libraryName);
if (libraryFile.isFile()) {
System.load(libraryFile.getAbsolutePath());
return;
}
} catch (UnsatisfiedLinkError e) {
// Ignore this error and fall back to extracting from the JAR file

@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.

@pepijnvepepijnveOct 13, 2025

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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.

I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.

@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.

}
}

final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
try {
File temp =
File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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GH-882: Add support for loading native library from a user specified location#883

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 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
GH-882: Add support for loading native library from a user specified location#883

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 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
Choose a reason for hiding this comment

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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
GH-882: Add support for loading native library from a user specified location#883

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to your account

 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
 Changes from all commits
Commits

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1 commit


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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
Choose a reason for hiding this comment

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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
GH-882: Add support for loading native library from a user specified location#883

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 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
GH-882: Add support for loading native library from a user specified location#883

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to your account

 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
 Changes from all commits
Commits

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1 commit


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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
GH-882: Add support for loading native library from a user specified location#883

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privacy statement. We’ll occasionally send you account related emails.

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to your account

 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

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Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

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Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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GH-882: Add support for loading native library from a user specified location#883

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 Merged

lidavidm
merged 1 commit into

from

Oct 27, 2025
 Merged


GH-882: Add support for loading native library from a user specified location
#883
 Changes from all commits
Commits

Show all changes


1 commit


Select commit


File filter

Filter by extension
Filter by extension
Conversations

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19 changes: 17 additions & 2 deletions
c/src/main/java/org/apache/arrow/c/jni/JniLoader.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -75,8 +75,23 @@ private synchronized void loadRemaining() {
 }

 private void load(String name) {
 final String libraryToLoad =
 name + "/" + getNormalizedArch() + "/" + System.mapLibraryName(name);
 String libraryName = System.mapLibraryName(name);

 // If 'arrow.cdata.library.path' is defined, try to load the native library from there
 String libraryPath = System.getProperty("arrow.cdata.library.path");
 if (libraryPath != null) {
 try {
 File libraryFile = new File(libraryPath, libraryName);
 if (libraryFile.isFile()) {
 System.load(libraryFile.getAbsolutePath());
 return;
 }
 } catch (UnsatisfiedLinkError e) {
 // Ignore this error and fall back to extracting from the JAR file
@lidavidmlidavidmOct 13, 2025

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Actually, would it be better to error if the property is provided but the file doesn't exist? That way you don't unexpectedly/silently fall back when you intended to load from somewhere else.
@pepijnvepepijnveOct 13, 2025

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ContributorAuthor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

In my specific application the native library will be have been stripped from the jar and loading will fail so the end result will be the same either way.
I modeled this on examples like the ones I referenced where possible alternatives are tried in a specified order. Happy to change this to fail early though. Let me know what you would prefer.
@lidavidmlidavidmOct 13, 2025

Copy link


Copy Markdown

Member
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Hmm, we can leave it as is then.
 }
 }

 final String libraryToLoad = name + "/" + getNormalizedArch() + "/" + libraryName;
 try {
 File temp =
 File.createTempFile("jnilib-", ".tmp", new File(System.getProperty("java.io.tmpdir")));
Expand Down
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