better resuming

gradle.properties

@@ -1,6 +1,6 @@
 group = org.xbib
 name = oai
-version = 2.5.3
+version = 2.5.4
 
 gradle.wrapper.version = 6.6.1
 xbib-content.version = 2.6.2

oai-client/src/main/java/org/xbib/oai/client/OAIClient.java

@@ -1,6 +1,7 @@
 package org.xbib.oai.client;
 
 import org.xbib.net.URL;
+import org.xbib.oai.OAIConstants;
 import org.xbib.oai.client.getrecord.GetRecordRequest;
 import org.xbib.oai.client.identify.IdentifyRequest;
 import org.xbib.oai.client.identify.IdentifyResponse;
@@ -99,18 +100,12 @@ public class OAIClient {
      * to the formats available for a specific item.
      * @return list metadata formats request
      */
-    public ListMetadataFormatsRequest newListMetadataFormatsRequest() {
-        return new ListMetadataFormatsRequest();
-    }
 
     /**
      * This verb is used to retrieve the set structure of a repository,
      * useful for selective harvesting.
      * @return list sets request
      */
-    public ListSetsRequest newListSetsRequest() {
-        return new ListSetsRequest();
-    }
 
     /**
      * This verb is an abbreviated form of ListRecords, retrieving only
@@ -122,9 +117,6 @@ public class OAIClient {
      * @return list identifiers request
      *
      */
-    public ListIdentifiersRequest newListIdentifiersRequest() {
-        return new ListIdentifiersRequest();
-    }
 
     /**
      * This verb is used to retrieve an individual metadata record from
@@ -137,9 +129,6 @@ public class OAIClient {
      * repository or from the specified item.
      * @return get record request
      */
-    public GetRecordRequest newGetRecordRequest() {
-        return new GetRecordRequest();
-    }
 
     /**
      * This verb is used to harvest records from a repository.
@@ -196,9 +185,20 @@ public class OAIClient {
                     }
                     ListRecordsResponse listRecordsResponse = new ListRecordsResponse(listRecordsRequest);
                     URL.Builder url = URL.from(baseURL).mutator();
-                    listRecordsRequest.getParams().forEach(url::queryParam);
+                    logger.log(Level.FINE, "before: baseURL = " + baseURL + " url = " + url.build() + " uri = ");
+                    // kind of hacky here - suppress all OAI params if resumption token is present
+                    if (listRecordsRequest.getResumptionToken() == null) {
+                        logger.log(Level.FINE, "no resumption token, params are " + listRecordsRequest.getParams() );
+                        listRecordsRequest.getParams().forEach(url::queryParam);
+                    } else {
+                        logger.log(Level.FINE, "no params because of resumption token " + listRecordsRequest.getResumptionToken());
+                        url.queryParam(OAIConstants.VERB_PARAMETER, OAIConstants.LIST_RECORDS);
+                        url.queryParam(OAIConstants.RESUMPTION_TOKEN_PARAMETER, listRecordsRequest.getResumptionToken().toString());
+                    }
+                    URI uri = URI.create(url.build().toExternalForm());
+                    logger.log(Level.FINE, "after: baseURL = " + baseURL + " url = " + url.build() + " uri = " + uri);
                     HttpRequest httpRequest = HttpRequest.newBuilder()
-                            .uri(URI.create(url.build().toExternalForm()))
+                            .uri(uri)
                             .header("accept", "utf-8")
                             .header("user-agent", userAgent != null ? userAgent : "xbib OAI client")
                             .GET()
@@ -216,7 +216,6 @@ public class OAIClient {
                         byte[] b = httpResponse.body();
                         if (b.length > 0) {
                             consumer.accept(new ByteArrayInputStream(b));
-                            logger.log(Level.FINE, "body consumed: " + body);
                         }
                     } else {
                         HttpResponse<String> httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandlers.ofString());
@@ -262,81 +261,15 @@ public class OAIClient {
         }
     }
 
-    public IdentifyRequest resume(IdentifyRequest request, ResumptionToken<?> token) {
-        if (request.isRetry()) {
-            request.setRetry(false);
-            return request;
-        }
-        if (token == null) {
-            return null;
-        }
-        IdentifyRequest nextRequest = new IdentifyRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
-    }
-
     public ListRecordsRequest resume(ListRecordsRequest request, ResumptionToken<?> token) {
+        ListRecordsRequest nextRequest = token != null ? new ListRecordsRequest() : request;
+        if (token != null) {
+            nextRequest.setResumptionToken(token);
+        }
         if (request.isRetry()) {
-            request.setRetry(false);
+            nextRequest.setRetry(false);
-            return request;
+            return nextRequest;
         }
-        if (token == null) {
+        return token != null ? nextRequest : null;
-            return null;
-        }
-        ListRecordsRequest nextRequest = new ListRecordsRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
-    }
-
-    public ListIdentifiersRequest resume(ListIdentifiersRequest request, ResumptionToken<?> token) {
-        if (request.isRetry()) {
-            request.setRetry(false);
-            return request;
-        }
-        if (token == null) {
-            return null;
-        }
-        ListIdentifiersRequest nextRequest = newListIdentifiersRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
-    }
-
-    public ListMetadataFormatsRequest resume(ListMetadataFormatsRequest request, ResumptionToken<?> token) {
-        if (request.isRetry()) {
-            request.setRetry(false);
-            return request;
-        }
-        if (token == null) {
-            return null;
-        }
-        ListMetadataFormatsRequest nextRequest = newListMetadataFormatsRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
-    }
-
-    public ListSetsRequest resume(ListSetsRequest request, ResumptionToken<?> token) {
-        if (request.isRetry()) {
-            request.setRetry(false);
-            return request;
-        }
-        if (token == null) {
-            return null;
-        }
-        ListSetsRequest nextRequest = newListSetsRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
-    }
-
-    public GetRecordRequest resume(GetRecordRequest request, ResumptionToken<?> token) {
-        if (request.isRetry()) {
-            request.setRetry(false);
-            return request;
-        }
-        if (token == null) {
-            return null;
-        }
-        GetRecordRequest nextRequest = newGetRecordRequest();
-        nextRequest.setResumptionToken(token);
-        return nextRequest;
     }
 }

oai-client/src/main/java/org/xbib/oai/client/listrecords/ListRecordsRequest.java

@@ -7,12 +7,9 @@ import org.xbib.oai.xml.MetadataHandler;
 import java.util.LinkedList;
 import java.util.List;
 
-/**
- *
- */
 public class ListRecordsRequest extends AbstractOAIRequest {
 
-    private List<MetadataHandler> handlers = new LinkedList<>();
+    private final List<MetadataHandler> handlers = new LinkedList<>();
 
     public ListRecordsRequest() {
         super();