update camel to 3.14 + stop trusting all ssl connections

pom.xml

@@ -51,6 +51,10 @@
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-spring</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.apache.camel</groupId>
+            <artifactId>camel-spring-xml</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-core</artifactId>
@@ -96,20 +100,6 @@
             <artifactId>Saxon-HE</artifactId>
             <version>9.8.0-14</version>
         </dependency>
-        <!-- Explicitly add JAXB dependencies. Needed for newer Java versions.
-        See also https://stackoverflow.com/questions/43574426/how-to-resolve-java-lang-noclassdeffounderror-javax-xml-bind-jaxbexception-in-j
-        -->
-        <!-- JAXB version corresponding to version used in Apache Camel -->
-        <dependency>
-            <groupId>javax.xml.bind</groupId>
-            <artifactId>jaxb-api</artifactId>
-            <version>${jaxb.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>javax.activation</groupId>
-            <artifactId>activation</artifactId>
-            <version>1.1.1</version>
-        </dependency>
     </dependencies>
     <build>
         <resources>
@@ -126,18 +116,17 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>2.3.2</version>
+                <version>3.8.0</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <release>11</release>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <version>2.10.1</version>
                 <configuration>
-                    <source>1.8</source>
+                    <source>1.11</source>
                     <minmemory>256m</minmemory>
                     <maxmemory>512m</maxmemory>
                 </configuration>
@@ -187,7 +176,7 @@
                 <plugin>
                     <artifactId>maven-war-plugin</artifactId>
                     <inherited>true</inherited>
-                    <version>2.2</version>
+                    <version>3.2.3</version>
                     <executions>
                         <execution>
                             <phase>package</phase>
@@ -223,11 +212,10 @@
         </pluginManagement>
     </build>
     <properties>
-        <camel.version>2.24.3</camel.version>
-        <jaxb.version>2.3.0</jaxb.version>
-        <spring.version>5.1.19.RELEASE</spring.version>
-        <spring-boot.version>2.1.18.RELEASE</spring-boot.version>
-        <spring-framework.version>${spring.version}</spring-framework.version>
+        <camel.version>3.14.0</camel.version>
+        <spring-boot.version>2.6.1</spring-boot.version>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <oai-pmh.base.url.external>http://localhost:8080/omdf</oai-pmh.base.url.external>
         <oai-pmh.db.item.csw.TYPE>inspire</oai-pmh.db.item.csw.TYPE>

src/main/java/eu/odp/harvest/geo/oai/xslt/HttpAwareUriResolver.java

@@ -4,17 +4,18 @@
 import org.apache.camel.Exchange;
 import org.apache.camel.ExchangePattern;
 import org.apache.camel.ProducerTemplate;
-import org.apache.camel.builder.xml.XsltUriResolver;
-import org.apache.camel.impl.DefaultExchange;
-import org.apache.commons.httpclient.HttpClient;
-import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
-import org.apache.commons.httpclient.methods.GetMethod;
+import org.apache.camel.component.xslt.XsltUriResolver;
+import org.apache.camel.support.DefaultExchange;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
 import org.apache.log4j.Logger;
 
 import javax.xml.transform.Source;
 import javax.xml.transform.TransformerException;
 import javax.xml.transform.stream.StreamSource;
-import java.io.ByteArrayInputStream;
 
 /**
  * Resolves a document reference for protocols "http" or "https" in an XSL document with HTTP client.
@@ -25,7 +26,8 @@ public class HttpAwareUriResolver extends XsltUriResolver {
 
     private final static Logger LOG = Logger.getLogger(HttpAwareUriResolver.class);
 
-    private static HttpClient httpClient = new HttpClient(new MultiThreadedHttpConnectionManager());
+    private static HttpClient httpClient = HttpClients.custom()
+            .setConnectionManager(new PoolingHttpClientConnectionManager()).build();
     private ProducerTemplate template;
     private CamelContext context;
 
@@ -71,18 +73,11 @@ private Source resolveRoute(String href) {
         String[] parts = href.split("\\?");
         exchange.getIn().setHeader("resourceIdentifiers", parts[1]);
         template.send(parts[0], exchange);
-        return new StreamSource(exchange.getOut().getBody(java.io.InputStream.class));
+        return new StreamSource(exchange.getMessage().getBody(java.io.InputStream.class));
     }
 
     private Source resolveHttp(String href) throws Exception {
-        GetMethod method = new GetMethod(href);
-        try {
-            httpClient.executeMethod(method);
-            byte[] bytes = method.getResponseBody();
-            return new StreamSource(new ByteArrayInputStream(bytes));
-        }
-        finally {
-            method.releaseConnection();
-        }
+        HttpResponse response = httpClient.execute(new HttpGet(href));
+        return new StreamSource(response.getEntity().getContent());
     }
 }