Fix PMD errors in core when run with Java 21

* `Thread.getId()` is deprecated. Since it's only used for reporting errors, use `Thread.getName()` instead * `new URL(String)` is deprecated. Use `new URI(String).toURL()` instead, throwing `MalformedURLException` to preserve the old behavior in methods that throw `IOException`. This is centralized in the new utility class/method `org.geowebcache.util.URLs.of(String url)` * `ExecutorService` implements `AutoCloseable` in Java 21, add `@SuppressWarnings("PMD.CloseResource")` in the test classes that use it * Add `@SuppressFBWarnings` for new rules
GeoWebCache · Jan 12, 2024 · 94d2d95 · 94d2d95
1 parent 4ee9e3e
commit 94d2d95
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diff --git a/geowebcache/azureblob/src/main/java/org/geowebcache/azure/AzureClient.java b/geowebcache/azureblob/src/main/java/org/geowebcache/azure/AzureClient.java
@@ -40,14 +40,14 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.Proxy;
-import java.net.URL;
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
 import javax.annotation.Nullable;
 import org.geowebcache.storage.StorageException;
+import org.geowebcache.util.URLs;
 import org.springframework.http.HttpStatus;
 
 class AzureClient implements Closeable {
@@ -86,7 +86,7 @@ public AzureClient(AzureBlobStoreData configuration) throws StorageException {
             PipelineOptions options = new PipelineOptions().withClient(client);
             ServiceURL serviceURL =
                     new ServiceURL(
-                            new URL(getServiceURL(configuration)),
+                            URLs.of(getServiceURL(configuration)),
                             StorageURL.createPipeline(creds, options));
 
             String containerName = configuration.getContainer();

diff --git a/geowebcache/core/src/main/java/org/geowebcache/config/XMLConfiguration.java b/geowebcache/core/src/main/java/org/geowebcache/config/XMLConfiguration.java
@@ -88,6 +88,7 @@
 import org.geowebcache.storage.UnsuitableStorageException;
 import org.geowebcache.util.ApplicationContextProvider;
 import org.geowebcache.util.ExceptionUtils;
+import org.geowebcache.util.URLs;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
@@ -266,10 +267,10 @@ public void setDefaultValues(TileLayer layer) {
             URL proxyUrl = null;
             try {
                 if (getGwcConfig().getProxyUrl() != null) {
-                    proxyUrl = new URL(getGwcConfig().getProxyUrl());
+                    proxyUrl = URLs.of(getGwcConfig().getProxyUrl());
                     log.fine("Using proxy " + proxyUrl.getHost() + ":" + proxyUrl.getPort());
                 } else if (wl.getProxyUrl() != null) {
-                    proxyUrl = new URL(wl.getProxyUrl());
+                    proxyUrl = URLs.of(wl.getProxyUrl());
                     log.fine("Using proxy " + proxyUrl.getHost() + ":" + proxyUrl.getPort());
                 }
             } catch (MalformedURLException e) {

diff --git a/geowebcache/core/src/main/java/org/geowebcache/config/XMLOldGrid.java b/geowebcache/core/src/main/java/org/geowebcache/config/XMLOldGrid.java
@@ -22,13 +22,19 @@
 import org.geowebcache.grid.GridSubset;
 import org.geowebcache.grid.GridSubsetFactory;
 import org.geowebcache.grid.SRS;
+import org.geowebcache.util.SuppressFBWarnings;
 
 /**
  * This class exists mainly to parse the old XML objects using XStream
  *
  * <p>The problem is that it cannot use the GridSetBroker, so we end up with one GridSet per layer
  * anyway.
  */
+@SuppressFBWarnings({
+    "NP_UNWRITTEN_FIELD",
+    "NP_UNWRITTEN_PUBLIC_OR_PROTECTED_FIELD",
+    "UWF_NULL_FIELD"
+}) // field assignment done by XStream
 public class XMLOldGrid implements Serializable {
 
     private static final long serialVersionUID = 1413422643636728997L;

diff --git a/geowebcache/core/src/main/java/org/geowebcache/filter/request/WMSRasterFilter.java b/geowebcache/core/src/main/java/org/geowebcache/filter/request/WMSRasterFilter.java
@@ -34,6 +34,7 @@
 import org.geowebcache.layer.wms.WMSLayer;
 import org.geowebcache.mime.ImageMime;
 import org.geowebcache.util.ServletUtils;
+import org.geowebcache.util.URLs;
 
 public class WMSRasterFilter extends RasterFilter {
 
@@ -110,7 +111,7 @@ protected BufferedImage loadMatrix(TileLayer tlayer, String gridSetId, int z)
                         + ") , "
                         + urlStr);
 
-        URL wmsUrl = new URL(urlStr);
+        URL wmsUrl = URLs.of(urlStr);
 
         if (backendTimeout == null) {
             backendTimeout = 120;

diff --git a/geowebcache/core/src/main/java/org/geowebcache/layer/TileLayerDispatcher.java b/geowebcache/core/src/main/java/org/geowebcache/layer/TileLayerDispatcher.java
@@ -113,7 +113,7 @@ public TileLayer getTileLayer(final String layerName) throws GeoWebCacheExceptio
         }
         throw new GeoWebCacheException(
                 "Thread "
-                        + Thread.currentThread().getId()
+                        + Thread.currentThread().getName()
                         + " Unknown layer "
                         + layerName
                         + ". Check the logfiles,"

diff --git a/geowebcache/core/src/main/java/org/geowebcache/layer/wms/WMSHttpHelper.java b/geowebcache/core/src/main/java/org/geowebcache/layer/wms/WMSHttpHelper.java
@@ -46,6 +46,7 @@
 import org.geowebcache.util.GWCVars;
 import org.geowebcache.util.HttpClientBuilder;
 import org.geowebcache.util.ServletUtils;
+import org.geowebcache.util.URLs;
 import org.springframework.util.Assert;
 
 /** This class is a wrapper for HTTP interaction with WMS backend */
@@ -115,7 +116,7 @@ protected void makeRequest(
             String requestUrl = layer.nextWmsURL();
 
             try {
-                wmsBackendUrl = new URL(requestUrl);
+                wmsBackendUrl = URLs.of(requestUrl);
             } catch (MalformedURLException maue) {
                 throw new GeoWebCacheException(
                         "Malformed URL: " + requestUrl + " " + maue.getMessage());

diff --git a/geowebcache/core/src/main/java/org/geowebcache/layer/wms/WMSLayer.java b/geowebcache/core/src/main/java/org/geowebcache/layer/wms/WMSLayer.java
@@ -54,6 +54,7 @@
 import org.geowebcache.mime.MimeType;
 import org.geowebcache.mime.XMLMime;
 import org.geowebcache.util.GWCVars;
+import org.geowebcache.util.URLs;
 
 /** A tile layer backed by a WMS server */
 public class WMSLayer extends AbstractTileLayer implements ProxyLayer {
@@ -803,9 +804,9 @@ public void proxyRequest(ConveyorTile tile) throws GeoWebCacheException {
         try {
             URL url;
             if (serverStr.contains("?")) {
-                url = new URL(serverStr + "&" + queryStr);
+                url = URLs.of(serverStr + "&" + queryStr);
             } else {
-                url = new URL(serverStr + queryStr);
+                url = URLs.of(serverStr + queryStr);
             }
 
             WMSSourceHelper helper = getSourceHelper();

diff --git a/geowebcache/core/src/main/java/org/geowebcache/locks/NIOLockProvider.java b/geowebcache/core/src/main/java/org/geowebcache/locks/NIOLockProvider.java
@@ -115,7 +115,7 @@ public LockProvider.Lock getLock(final String lockKey) throws GeoWebCacheExcepti
                             "Lock "
                                     + lockKey
                                     + " acquired by thread "
-                                    + Thread.currentThread().getId()
+                                    + Thread.currentThread().getName()
                                     + " on file "
                                     + file);
                 }
@@ -151,7 +151,7 @@ public void release() throws GeoWebCacheException {
                                                     + " for releasing lock is unkonwn, it means "
                                                     + "this lock was never acquired, or was released twice. "
                                                     + "Current thread is: "
-                                                    + Thread.currentThread().getId()
+                                                    + Thread.currentThread().getName()
                                                     + ". "
                                                     + "Are you running two GWC instances in the same JVM using NIO locks? "
                                                     + "This case is not supported and will generate exactly this error message");
@@ -170,7 +170,7 @@ public void release() throws GeoWebCacheException {
                                                     + " on file "
                                                     + lockFile
                                                     + " released by thread "
-                                                    + Thread.currentThread().getId());
+                                                    + Thread.currentThread().getName());
                                 }
                             } catch (IOException e) {
                                 throw new GeoWebCacheException(

diff --git a/geowebcache/core/src/main/java/org/geowebcache/proxy/ProxyDispatcher.java b/geowebcache/core/src/main/java/org/geowebcache/proxy/ProxyDispatcher.java
@@ -22,6 +22,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.geotools.util.logging.Logging;
+import org.geowebcache.util.URLs;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.AbstractController;
 
@@ -62,7 +63,7 @@ protected ModelAndView handleRequestInternal(
         }
         String decodedUrl = URLDecoder.decode(urlStr, charEnc);
 
-        URL url = new URL(decodedUrl);
+        URL url = URLs.of(decodedUrl);
         HttpURLConnection wmsBackendCon = (HttpURLConnection) url.openConnection();
 
         if (wmsBackendCon.getContentEncoding() != null) {

diff --git a/geowebcache/core/src/main/java/org/geowebcache/storage/BlobStoreAggregator.java b/geowebcache/core/src/main/java/org/geowebcache/storage/BlobStoreAggregator.java
@@ -103,7 +103,7 @@ public BlobStoreInfo getBlobStore(final String blobStoreName) throws GeoWebCache
                         () ->
                                 new GeoWebCacheException(
                                         "Thread "
-                                                + Thread.currentThread().getId()
+                                                + Thread.currentThread().getName()
                                                 + " Unknown blob store "
                                                 + blobStoreName
                                                 + ". Check the logfiles,"

diff --git a/geowebcache/core/src/main/java/org/geowebcache/util/URLs.java b/geowebcache/core/src/main/java/org/geowebcache/util/URLs.java
@@ -0,0 +1,52 @@
+/**
+ * This program is free software: you can redistribute it and/or modify it under the terms of the
+ * GNU Lesser General Public License as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * <p>This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * <p>You should have received a copy of the GNU Lesser General Public License along with this
+ * program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.geowebcache.util;
+
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+/** Utilities for manipulating and converting to and from {@link URL}s. */
+public class URLs {
+
+    private URLs() {
+        // private constructor signaling this is a pure-utility class
+    }
+
+    /**
+     * Creates a {@code URL} object from the {@code String} representation.
+     *
+     * <p>Prefer this method to {@code new URL(String)}, which is <a
+     * href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/net/URL.html#constructor-deprecation">deprecated
+     * in Java 21</a>.
+     *
+     * <p>Note a {@link URISyntaxException} will be rethrown as {@link MalformedURLException} to
+     * preserve the behavior of code that used to call {@code new URL(String)} and expected either a
+     * {@code MalformedURLException} or its super type {@code java.io.IOException}.
+     *
+     * @param url a URL string to build a {@link URL} from
+     * @return the URL built from the argument
+     * @throws MalformedURLException if {code}url{code} is not a valid {@link URI} nor a valid
+     *     {@link URL} as per {@link URI#toURL()}
+     */
+    public static URL of(String url) throws MalformedURLException {
+        try {
+            return new URI(url).toURL();
+        } catch (URISyntaxException orig) {
+            MalformedURLException e = new MalformedURLException(orig.getMessage());
+            e.initCause(orig);
+            throw e;
+        }
+    }
+}
diff --git a/...cache/core/src/test/java/org/geowebcache/blobstore/file/FileBlobStoreComformanceTest.java b/...cache/core/src/test/java/org/geowebcache/blobstore/file/FileBlobStoreComformanceTest.java
@@ -50,6 +50,7 @@ public void createTestUnit() throws Exception {
     private void putLayerMetadataConcurrently(
             final int srcStoreKey, final FileBlobStore srcStore, int numberOfThreads)
             throws InterruptedException {
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService service = Executors.newFixedThreadPool(numberOfThreads);
         CountDownLatch latch = new CountDownLatch(numberOfThreads);
         for (int i = 0; i < numberOfThreads; i++) {
@@ -75,6 +76,7 @@ private void putLayerMetadataConcurrently(
 
     private void executeStoresConcurrently(int numberOfStores, int numberOfThreads)
             throws InterruptedException {
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService service = Executors.newFixedThreadPool(numberOfStores);
         CountDownLatch latch = new CountDownLatch(numberOfStores);
         for (int i = 0; i < numberOfStores; i++) {
@@ -106,6 +108,7 @@ public void testMetadataWithPointInKey() throws Exception {
     public void testConcurrentMetadataWithPointInKey() throws InterruptedException {
         assertThat(store.getLayerMetadata("testLayer", "test.Key"), nullValue());
         int numberOfThreads = 2;
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService service = Executors.newFixedThreadPool(numberOfThreads);
         CountDownLatch latch = new CountDownLatch(numberOfThreads);
         for (int i = 0; i < numberOfThreads; i++) {

diff --git a/geowebcache/core/src/test/java/org/geowebcache/config/ConfigurationTest.java b/geowebcache/core/src/test/java/org/geowebcache/config/ConfigurationTest.java
@@ -345,6 +345,7 @@ public void testConcurrentAdds() throws Exception {
                 defaultCount + 10,
                 getInfoNames(config).size());
         // get a thread pool
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService pool =
                 Executors.newFixedThreadPool(
                         16, (Runnable r) -> new Thread(r, "Info Concurrency Test for ADD"));
@@ -389,6 +390,7 @@ public void testConcurrentDeletes() throws Exception {
                 defaultCount + 100,
                 getInfoNames(config).size());
         // get a thread pool
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService pool =
                 Executors.newFixedThreadPool(
                         16, (Runnable r) -> new Thread(r, "Info Concurrency Test for DELETE"));
@@ -431,6 +433,7 @@ public void testConcurrentModifies() throws Exception {
                 defaultCount + 100,
                 getInfoNames(config).size());
         // get a thread pool
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService pool =
                 Executors.newFixedThreadPool(
                         16, (Runnable r) -> new Thread(r, "Info Concurrency Test for MODIFY"));

diff --git a/geowebcache/core/src/test/java/org/geowebcache/config/DefaultingConfigurationTest.java b/geowebcache/core/src/test/java/org/geowebcache/config/DefaultingConfigurationTest.java
@@ -27,6 +27,7 @@
 import org.geowebcache.layer.TileLayer;
 import org.geowebcache.layer.wms.WMSHttpHelper;
 import org.geowebcache.layer.wms.WMSLayer;
+import org.geowebcache.util.URLs;
 import org.junit.Test;
 
 public class DefaultingConfigurationTest {
@@ -111,9 +112,9 @@ public void setDefaultValues(TileLayer layer) {
                     URL proxyUrl = null;
                     try {
                         if (getGwcConfig().getProxyUrl() != null) {
-                            proxyUrl = new URL(getGwcConfig().getProxyUrl());
+                            proxyUrl = URLs.of(getGwcConfig().getProxyUrl());
                         } else if (wl.getProxyUrl() != null) {
-                            proxyUrl = new URL(wl.getProxyUrl());
+                            proxyUrl = URLs.of(wl.getProxyUrl());
                         }
                     } catch (MalformedURLException e) {
                     }

diff --git a/geowebcache/core/src/test/java/org/geowebcache/layer/wms/WMSLayerTest.java b/geowebcache/core/src/test/java/org/geowebcache/layer/wms/WMSLayerTest.java
@@ -601,6 +601,7 @@ private List<ConveyorTile> getTiles(
         long[] gridLoc = trIter.nextMetaGridLocation(new long[3]);
 
         // six concurrent requests max
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService requests = Executors.newFixedThreadPool(6);
         ExecutorCompletionService<ConveyorTile> completer =
                 new ExecutorCompletionService<>(requests);

diff --git a/geowebcache/core/src/test/java/org/geowebcache/storage/TileRangeIteratorTest.java b/geowebcache/core/src/test/java/org/geowebcache/storage/TileRangeIteratorTest.java
@@ -215,6 +215,7 @@ private long traverseTileRangeIter(
             final int[] metaTilingFactors)
             throws Exception {
 
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         final ExecutorService executorService = Executors.newFixedThreadPool(nThreads);
 
         final TileRange tileRange;

diff --git a/geowebcache/diskquota/core/src/main/java/org/geowebcache/diskquota/storage/PagePyramid.java b/geowebcache/diskquota/core/src/main/java/org/geowebcache/diskquota/storage/PagePyramid.java
@@ -16,7 +16,6 @@
 
 import java.math.BigInteger;
 import java.text.NumberFormat;
-import java.util.Locale;
 import java.util.Map;
 import java.util.TreeMap;
 import org.geowebcache.grid.GridSubset;
@@ -84,7 +83,7 @@ public PageLevelInfo(
 
         @Override
         public String toString() {
-            NumberFormat nf = NumberFormat.getInstance(new Locale("es"));
+            NumberFormat nf = NumberFormat.getInstance();
             nf.setGroupingUsed(true);
 
             return "Pages: "

diff --git a/...cache/diskquota/core/src/test/java/org/geowebcache/diskquota/storage/PagePyramidTest.java b/...cache/diskquota/core/src/test/java/org/geowebcache/diskquota/storage/PagePyramidTest.java
@@ -22,7 +22,6 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
-import java.util.Locale;
 import java.util.logging.Logger;
 import org.geotools.util.logging.Logging;
 import org.geowebcache.config.DefaultGridsets;
@@ -76,7 +75,7 @@ public void testCalculatePageInfo() {
     }
 
     private void printPyramid(int zoomStart, int zoomStop, PagePyramid pp) {
-        NumberFormat nf = NumberFormat.getInstance(new Locale("es"));
+        NumberFormat nf = NumberFormat.getInstance();
         nf.setGroupingUsed(true);
 
         long totalPages = 0;

diff --git a/geowebcache/georss/src/main/java/org/geowebcache/georss/GeoRSSPollTask.java b/geowebcache/georss/src/main/java/org/geowebcache/georss/GeoRSSPollTask.java
@@ -37,6 +37,7 @@
 import org.geowebcache.storage.DiscontinuousTileRange;
 import org.geowebcache.storage.RasterMask;
 import org.geowebcache.storage.StorageBroker;
+import org.geowebcache.util.URLs;
 
 /**
  * A task to run a GeoRSS feed poll and launch the seeding process
@@ -128,7 +129,7 @@ private void runPollAndLaunchSeed() throws IOException {
         final String previousUpdatedEntry = storageBroker.getLayerMetadata(layerName, LAST_UPDATED);
 
         final String gridSetId = pollDef.getGridSetId();
-        final URL feedUrl = new URL(templateFeedUrl(pollDef.getFeedUrl(), previousUpdatedEntry));
+        URL feedUrl = URLs.of(templateFeedUrl(pollDef.getFeedUrl(), previousUpdatedEntry));
         final String httpUsername = pollDef.getHttpUsername();
         final String httpPassword = pollDef.getHttpUsername();
 

diff --git a/geowebcache/sqlite/src/test/java/org/geowebcache/sqlite/SqliteConnectionManagerTest.java b/geowebcache/sqlite/src/test/java/org/geowebcache/sqlite/SqliteConnectionManagerTest.java
@@ -161,6 +161,7 @@ private void genericMultiThreadsTest(
             int threadsNumber, int workersNumber, long poolSize, File... files) throws Exception {
         SqliteConnectionManager connectionManager = new SqliteConnectionManager(poolSize, 10);
         connectionManagersToClean.add(connectionManager);
+        @SuppressWarnings("PMD.CloseResource") // implements AutoCloseable in Java 21
         ExecutorService executor = Executors.newFixedThreadPool(threadsNumber);
         Random random = new Random();
         List<Future<Tuple<File, String>>> results = new ArrayList<>();