fix #441 : refactoring for StringBuilder

pom.xml

@@ -769,7 +769,7 @@
 		<dependency>
 			<groupId>org.codelibs</groupId>
 			<artifactId>corelib</artifactId>
-			<version>0.3.3</version>
+			<version>0.3.4-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>commons-io</groupId>

src/main/java/org/codelibs/fess/api/json/JsonApiManager.java

@@ -32,7 +32,6 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.apache.commons.io.output.StringBuilderWriter;
 import org.codelibs.core.CoreLibConstants;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.core.misc.DynamicProperties;
@@ -141,7 +140,7 @@ public class JsonApiManager extends BaseApiManager {
         int status = 0;
         String errMsg = StringUtil.EMPTY;
         String query = null;
-        final StringBuilder buf = new StringBuilder(1000);
+        final StringBuilder buf = new StringBuilder(1000); // TODO replace response stream
         request.setAttribute(Constants.SEARCH_LOG_ACCESS_TYPE, Constants.SEARCH_LOG_ACCESS_TYPE_JSON);
         try {
             final SearchRenderData data = new SearchRenderData();
@@ -278,7 +277,7 @@ public class JsonApiManager extends BaseApiManager {
 
         int status = 0;
         String errMsg = StringUtil.EMPTY;
-        final StringBuilder buf = new StringBuilder(255);
+        final StringBuilder buf = new StringBuilder(255); // TODO replace response stream
         try {
             final List<Map<String, String>> labelTypeItems = labelTypeHelper.getLabelTypeItemList();
             buf.append("\"record_count\":");
@@ -328,7 +327,7 @@ public class JsonApiManager extends BaseApiManager {
 
         int status = 0;
         String errMsg = StringUtil.EMPTY;
-        final StringBuilder buf = new StringBuilder(255);
+        final StringBuilder buf = new StringBuilder(255); // TODO replace response stream
         try {
             final List<String> popularWordList = popularWordHelper.getWordList(seed, tags, null, fields, excludes);
 
@@ -493,7 +492,7 @@ public class JsonApiManager extends BaseApiManager {
                 }
             }
 
-            final StringBuilder buf = new StringBuilder();
+            final StringBuilder buf = new StringBuilder(255); // TODO replace response stream
             buf.append("\"num\":").append(docIdList.size());
             if (!docIdList.isEmpty()) {
                 buf.append(", \"doc_ids\":[");

src/main/java/org/codelibs/fess/api/suggest/SuggestApiManager.java

@@ -60,7 +60,7 @@ public class SuggestApiManager extends BaseApiManager {
             ServletException {
         int status = 0;
         String errMsg = StringUtil.EMPTY;
-        final StringBuilder buf = new StringBuilder(255);
+        final StringBuilder buf = new StringBuilder(255); // TODO replace response stream
         final RoleQueryHelper roleQueryHelper = ComponentUtil.getRoleQueryHelper();
 
         try {

src/main/java/org/codelibs/fess/crawler/transformer/AbstractFessFileTransformer.java

@@ -46,6 +46,7 @@ import org.codelibs.fess.crawler.exception.CrawlingAccessException;
 import org.codelibs.fess.crawler.extractor.Extractor;
 import org.codelibs.fess.crawler.transformer.impl.AbstractTransformer;
 import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
+import org.codelibs.fess.crawler.util.UnsafeStringBuilder;
 import org.codelibs.fess.es.config.exentity.CrawlingConfig;
 import org.codelibs.fess.es.config.exentity.CrawlingConfig.ConfigName;
 import org.codelibs.fess.helper.CrawlingConfigHelper;
@@ -101,7 +102,7 @@ public abstract class AbstractFessFileTransformer extends AbstractTransformer im
         final String mimeType = responseData.getMimeType();
         params.put(HttpHeaders.CONTENT_TYPE, mimeType);
         params.put(HttpHeaders.CONTENT_ENCODING, responseData.getCharSet());
-        final StringBuilder contentMetaBuf = new StringBuilder(1000);
+        final UnsafeStringBuilder contentMetaBuf = new UnsafeStringBuilder(1000);
         final Map<String, Object> dataMap = new HashMap<String, Object>();
         final Map<String, Object> metaDataMap = new HashMap<>();
         String content;
@@ -163,7 +164,7 @@ public abstract class AbstractFessFileTransformer extends AbstractTransformer im
         if (content == null) {
             content = StringUtil.EMPTY;
         }
-        final String contentMeta = contentMetaBuf.toString();
+        final String contentMeta = contentMetaBuf.toUnsafeString().trim();
 
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
@@ -201,7 +202,7 @@ public abstract class AbstractFessFileTransformer extends AbstractTransformer im
         // segment
         putResultDataBody(dataMap, fessConfig.getIndexFieldSegment(), sessionId);
         // content
-        final StringBuilder buf = new StringBuilder(content.length() + 1000);
+        final UnsafeStringBuilder buf = new UnsafeStringBuilder(content.length() + 1000);
         if (fessConfig.isCrawlerDocumentFileAppendBodyContent()) {
             buf.append(content);
         }
@@ -211,7 +212,8 @@ public abstract class AbstractFessFileTransformer extends AbstractTransformer im
             }
             buf.append(contentMeta);
         }
-        final String body = documentHelper.getContent(responseData, buf.toString(), dataMap);
+        final String bodyBase = buf.toUnsafeString().trim();
+        final String body = documentHelper.getContent(responseData, bodyBase, dataMap);
         putResultDataBody(dataMap, fessConfig.getIndexFieldContent(), body);
         if ((Constants.TRUE.equalsIgnoreCase(fieldConfigMap.get(fessConfig.getIndexFieldCache())) || fessConfig
                 .isCrawlerDocumentCacheEnabled()) && fessConfig.isSupportedDocumentCacheMimetypes(mimeType)) {
@@ -225,8 +227,8 @@ public abstract class AbstractFessFileTransformer extends AbstractTransformer im
             }
         }
         // digest
-        putResultDataBody(dataMap, fessConfig.getIndexFieldDigest(), documentHelper.getDigest(responseData, buf.toString(), dataMap,
-                fessConfig.getCrawlerDocumentFileMaxDigestLengthAsInteger()));
+        putResultDataBody(dataMap, fessConfig.getIndexFieldDigest(),
+                documentHelper.getDigest(responseData, bodyBase, dataMap, fessConfig.getCrawlerDocumentFileMaxDigestLengthAsInteger()));
         // title
         if (!dataMap.containsKey(fessConfig.getIndexFieldTitle())) {
             if (url.endsWith("/")) {

src/main/java/org/codelibs/fess/crawler/transformer/FessXpathTransformer.java

@@ -46,6 +46,7 @@ import org.codelibs.fess.crawler.exception.CrawlerSystemException;
 import org.codelibs.fess.crawler.exception.CrawlingAccessException;
 import org.codelibs.fess.crawler.transformer.impl.XpathTransformer;
 import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
+import org.codelibs.fess.crawler.util.UnsafeStringBuilder;
 import org.codelibs.fess.es.config.exentity.CrawlingConfig;
 import org.codelibs.fess.es.config.exentity.CrawlingConfig.ConfigName;
 import org.codelibs.fess.helper.CrawlingConfigHelper;
@@ -345,13 +346,13 @@ public class FessXpathTransformer extends XpathTransformer implements FessTransf
     }
 
     protected String getSingleNodeValue(final Document document, final String xpath, final boolean pruned) {
-        StringBuilder buf = null;
+        UnsafeStringBuilder buf = null;
         NodeList list = null;
         try {
             list = getXPathAPI().selectNodeList(document, xpath);
             for (int i = 0; i < list.getLength(); i++) {
                 if (buf == null) {
-                    buf = new StringBuilder(1000);
+                    buf = new UnsafeStringBuilder(1000);
                 } else {
                     buf.append(' ');
                 }
@@ -369,7 +370,7 @@ public class FessXpathTransformer extends XpathTransformer implements FessTransf
         if (buf == null) {
             return null;
         }
-        return buf.toString();
+        return buf.toUnsafeString().trim();
     }
 
     protected Node pruneNode(final Node node) {
@@ -407,7 +408,7 @@ public class FessXpathTransformer extends XpathTransformer implements FessTransf
 
     protected String getMultipleNodeValue(final Document document, final String xpath) {
         NodeList nodeList = null;
-        final StringBuilder buf = new StringBuilder(100);
+        final UnsafeStringBuilder buf = new UnsafeStringBuilder(100);
         try {
             nodeList = getXPathAPI().selectNodeList(document, xpath);
             for (int i = 0; i < nodeList.getLength(); i++) {
@@ -418,7 +419,7 @@ public class FessXpathTransformer extends XpathTransformer implements FessTransf
         } catch (final Exception e) {
             logger.warn("Could not parse a value of " + xpath);
         }
-        return buf.toString();
+        return buf.toUnsafeString().trim();
     }
 
     protected String replaceDuplicateHost(final String url) {

src/main/java/org/codelibs/fess/ds/impl/IndexUpdateCallbackImpl.java

@@ -15,8 +15,6 @@
  */
 package org.codelibs.fess.ds.impl;
 
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicLong;
 
@@ -29,6 +27,7 @@ import org.codelibs.fess.helper.SearchLogHelper;
 import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
+import org.codelibs.fess.util.DocList;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -39,7 +38,7 @@ public class IndexUpdateCallbackImpl implements IndexUpdateCallback {
 
     protected volatile long executeTime = 0;
 
-    final List<Map<String, Object>> docList = new ArrayList<>();
+    final DocList docList = new DocList();
 
     /* (non-Javadoc)
      * @see org.codelibs.fess.ds.impl.IndexUpdateCallback#store(java.util.Map)

src/main/java/org/codelibs/fess/helper/CrawlingInfoHelper.java

@@ -27,6 +27,7 @@ import java.util.Map;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.service.CrawlingInfoService;
+import org.codelibs.fess.crawler.util.UnsafeStringBuilder;
 import org.codelibs.fess.es.client.FessEsClient;
 import org.codelibs.fess.es.config.exentity.CrawlingConfig;
 import org.codelibs.fess.es.config.exentity.CrawlingInfo;
@@ -187,7 +188,7 @@ public class CrawlingInfoHelper implements Serializable {
     }
 
     private String generateId(final String url, final List<String> roleTypeList) {
-        final StringBuilder buf = new StringBuilder(1000);
+        final UnsafeStringBuilder buf = new UnsafeStringBuilder(1000);
         buf.append(url);
         if (roleTypeList != null && !roleTypeList.isEmpty()) {
             Collections.sort(roleTypeList);
@@ -200,7 +201,7 @@ public class CrawlingInfoHelper implements Serializable {
             }
         }
 
-        return normalize(buf.toString());
+        return normalize(buf.toUnsafeString().trim());
     }
 
     private String normalize(final String value) {

src/main/java/org/codelibs/fess/helper/DocumentHelper.java

@@ -21,6 +21,7 @@ import java.util.Map;
 import org.apache.commons.lang3.StringUtils;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.crawler.entity.ResponseData;
+import org.codelibs.fess.crawler.util.UnsafeStringBuilder;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
 import org.slf4j.Logger;
@@ -38,7 +39,7 @@ public class DocumentHelper implements Serializable {
         }
 
         final int maxAlphanumTermSize = getMaxAlphanumSize();
-        final StringBuilder buf = new StringBuilder(content.length());
+        final UnsafeStringBuilder buf = new UnsafeStringBuilder(content.length());
         boolean isSpace = false;
         int alphanumSize = 0;
         for (int i = 0; i < content.length(); i++) {
@@ -68,7 +69,7 @@ public class DocumentHelper implements Serializable {
             }
         }
 
-        return buf.toString().trim();
+        return buf.toUnsafeString().trim();
     }
 
     protected int getMaxAlphanumSize() {

src/main/java/org/codelibs/fess/helper/IndexingHelper.java

@@ -19,9 +19,11 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.io.FileUtils;
 import org.codelibs.fess.es.client.FessEsClient;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
+import org.codelibs.fess.util.DocList;
 import org.elasticsearch.action.count.CountResponse;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
@@ -37,7 +39,7 @@ public class IndexingHelper {
 
     public long requestInterval = 500;
 
-    public void sendDocuments(final FessEsClient fessEsClient, final List<Map<String, Object>> docList) {
+    public void sendDocuments(final FessEsClient fessEsClient, final DocList docList) {
         if (docList.isEmpty()) {
             return;
         }
@@ -52,14 +54,29 @@ public class IndexingHelper {
                 fessEsClient.addAll(fessConfig.getIndexDocumentUpdateIndex(), fessConfig.getIndexDocumentType(), docList);
             }
             if (logger.isInfoEnabled()) {
-                logger.info("Sent " + docList.size() + " docs (" + (System.currentTimeMillis() - execTime) + "ms)");
+                final Runtime runtime = Runtime.getRuntime();
+                final long freeBytes = runtime.freeMemory();
+                final long maxBytes = runtime.maxMemory();
+                final long totalBytes = runtime.totalMemory();
+                final long usedBytes = totalBytes - freeBytes;
+                if (docList.getContentSize() > 0) {
+                    logger.info("Sent " + docList.size() + " docs (Doc:{process " + docList.getProcessingTime() + "ms, send "
+                            + (System.currentTimeMillis() - execTime) + "ms, size "
+                            + FileUtils.byteCountToDisplaySize(docList.getContentSize()) + "}, Mem:{used "
+                            + FileUtils.byteCountToDisplaySize(usedBytes) + ", heap " + FileUtils.byteCountToDisplaySize(totalBytes)
+                            + ", max " + FileUtils.byteCountToDisplaySize(maxBytes) + "})");
+                } else {
+                    logger.info("Sent " + docList.size() + " docs (Doc:{send " + (System.currentTimeMillis() - execTime)
+                            + "ms}, Mem:{used " + FileUtils.byteCountToDisplaySize(usedBytes) + ", heap "
+                            + FileUtils.byteCountToDisplaySize(totalBytes) + ", max " + FileUtils.byteCountToDisplaySize(maxBytes) + "})");
+                }
             }
         } finally {
             docList.clear();
         }
     }
 
-    private void deleteOldDocuments(final FessEsClient fessEsClient, final List<Map<String, Object>> docList) {
+    private void deleteOldDocuments(final FessEsClient fessEsClient, final DocList docList) {
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
 
         final List<String> docIdList = new ArrayList<>();

src/main/java/org/codelibs/fess/helper/LabelTypeHelper.java

@@ -185,7 +185,7 @@ public class LabelTypeHelper implements Serializable {
             this.value = value;
 
             if (StringUtil.isNotBlank(includedPaths)) {
-                final StringBuilder buf = new StringBuilder();
+                final StringBuilder buf = new StringBuilder(100);
                 char split = 0;
                 for (final String path : includedPaths.split("\n")) {
                     if (split == 0) {
@@ -199,7 +199,7 @@ public class LabelTypeHelper implements Serializable {
             }
 
             if (StringUtil.isNotBlank(excludedPaths)) {
-                final StringBuilder buf = new StringBuilder();
+                final StringBuilder buf = new StringBuilder(100);
                 char split = 0;
                 for (final String path : excludedPaths.split("\n")) {
                     if (split == 0) {

src/main/java/org/codelibs/fess/helper/SuggestHelper.java

@@ -110,7 +110,7 @@ public class SuggestHelper {
                         return;
                     }
 
-                    final StringBuilder sb = new StringBuilder();
+                    final StringBuilder sb = new StringBuilder(100);
                     final List<String> fields = new ArrayList<>();
                     final List<String> tags = new ArrayList<>();
                     final List<String> roles = new ArrayList<>();

src/main/java/org/codelibs/fess/helper/SystemHelper.java

@@ -152,7 +152,7 @@ public class SystemHelper implements Serializable {
         }
 
         try {
-            final StringBuilder buf = new StringBuilder();
+            final StringBuilder buf = new StringBuilder(path.length() + 100);
             for (int i = 0; i < path.length(); i++) {
                 final char c = path.charAt(i);
                 if (CharUtil.isUrlChar(c) || c == '^' || c == '{' || c == '}' || c == '|' || c == '\\') {

src/main/java/org/codelibs/fess/indexer/IndexUpdater.java

@@ -24,6 +24,7 @@ import java.util.function.Consumer;
 import javax.annotation.PreDestroy;
 import javax.annotation.Resource;
 
+import org.apache.commons.io.FileUtils;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.crawler.Crawler;
@@ -47,6 +48,7 @@ import org.codelibs.fess.helper.SearchLogHelper;
 import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
+import org.codelibs.fess.util.DocList;
 import org.elasticsearch.action.search.SearchRequestBuilder;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
@@ -172,7 +174,7 @@ public class IndexUpdater extends Thread {
                         builder.addSort(EsAccessResult.CREATE_TIME, SortOrder.ASC);
                     };
 
-            final List<Map<String, Object>> docList = new ArrayList<>();
+            final DocList docList = new DocList();
             final List<EsAccessResult> accessResultList = new ArrayList<>();
 
             long updateTime = System.currentTimeMillis();
@@ -299,11 +301,9 @@ public class IndexUpdater extends Thread {
         }
     }
 
-    private void processAccessResults(final List<Map<String, Object>> docList, final List<EsAccessResult> accessResultList,
-            final List<EsAccessResult> arList) {
+    private void processAccessResults(final DocList docList, final List<EsAccessResult> accessResultList, final List<EsAccessResult> arList) {
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         final long maxDocumentRequestSize = fessConfig.getIndexerWebfsMaxDocumentRequestSizeAsInteger().longValue();
-        long contentSize = 0;
         for (final EsAccessResult accessResult : arList) {
             if (logger.isDebugEnabled()) {
                 logger.debug("Indexing " + accessResult.getUrl());
@@ -319,6 +319,7 @@ public class IndexUpdater extends Thread {
                 continue;
             }
 
+            final long startTime = System.currentTimeMillis();
             final AccessResultData<?> accessResultData = accessResult.getAccessResultData();
             if (accessResultData != null) {
                 accessResult.setAccessResultData(null);
@@ -349,19 +350,19 @@ public class IndexUpdater extends Thread {
                     updateDocument(map);
 
                     docList.add(map);
+                    final long processingTime = System.currentTimeMillis() - startTime;
+                    docList.addProcessingTime(processingTime);
                     if (logger.isDebugEnabled()) {
-                        logger.debug("Added the document(" + contentSize + " bytes). " + "The number of a document cache is "
-                                + docList.size() + ".");
+                        logger.debug("Added the document(" + FileUtils.byteCountToDisplaySize(docList.getContentSize()) + ", "
+                                + processingTime + "ms). " + "The number of a document cache is " + docList.size() + ".");
                     }
 
                     if (accessResult.getContentLength() == null) {
                         indexingHelper.sendDocuments(fessEsClient, docList);
-                        contentSize = 0;
                     } else {
-                        contentSize += accessResult.getContentLength().longValue();
-                        if (contentSize >= maxDocumentRequestSize) {
+                        docList.addContentSize(accessResult.getContentLength().longValue());
+                        if (docList.getContentSize() >= maxDocumentRequestSize) {
                             indexingHelper.sendDocuments(fessEsClient, docList);
-                            contentSize = 0;
                         }
                     }
                     documentSize++;
@@ -482,15 +483,19 @@ public class IndexUpdater extends Thread {
         }
         final long totalHits = ((EsResultList<EsAccessResult>) arList).getTotalHits();
         if (logger.isInfoEnabled()) {
-            logger.info("Processing " + arList.size() + "/" + totalHits + " docs (" + (System.currentTimeMillis() - execTime) + "ms)");
+            if (totalHits > 0) {
+                logger.info("Processing " + arList.size() + "/" + totalHits + " docs (" + (System.currentTimeMillis() - execTime) + "ms)");
+            } else {
+                logger.info("Processing no docs (" + (System.currentTimeMillis() - execTime) + "ms)");
+            }
         }
         final long unprocessedDocumentSize = fessConfig.getIndexerUnprocessedDocumentSizeAsInteger().longValue();
-        if (totalHits > unprocessedDocumentSize) {
+        final IntervalControlHelper intervalControlHelper = ComponentUtil.getIntervalControlHelper();
+        if (totalHits > unprocessedDocumentSize && intervalControlHelper.isCrawlerRunning()) {
             if (logger.isInfoEnabled()) {
                 logger.info("Stopped all crawler threads. " + " You have " + totalHits + " (>" + unprocessedDocumentSize + ") "
                         + " unprocessed docs.");
             }
-            final IntervalControlHelper intervalControlHelper = ComponentUtil.getIntervalControlHelper();
             intervalControlHelper.setCrawlerRunning(false);
         }
         return arList;

src/main/java/org/codelibs/fess/job/CrawlJob.java

@@ -178,7 +178,7 @@ public class CrawlJob {
     }
 
     public String execute() {
-        final StringBuilder resultBuf = new StringBuilder();
+        final StringBuilder resultBuf = new StringBuilder(100);
         final boolean runAll = webConfigIds == null && fileConfigIds == null && dataConfigIds == null;
 
         if (sessionId == null) { // create session id
@@ -255,7 +255,7 @@ public class CrawlJob {
 
         // -cp
         cmdList.add("-cp");
-        final StringBuilder buf = new StringBuilder();
+        final StringBuilder buf = new StringBuilder(100);
         final String confPath = System.getProperty(Constants.FESS_CONF_PATH);
         if (StringUtil.isNotBlank(confPath)) {
             buf.append(confPath);

src/main/java/org/codelibs/fess/job/SuggestJob.java

@@ -107,10 +107,9 @@ public class SuggestJob {
 
         try {
             executeSuggestCreator();
-        } catch (final FessSystemException e) {
-            throw e;
         } catch (final Exception e) {
-            throw new FessSystemException("Failed to execute a crawl job.", e);
+            logger.error("Failed to purge user info.", e);
+            resultBuf.append(e.getMessage()).append("\n");
         }
 
         return resultBuf.toString();
@@ -128,7 +127,7 @@ public class SuggestJob {
 
         // -cp
         cmdList.add("-cp");
-        final StringBuilder buf = new StringBuilder();
+        final StringBuilder buf = new StringBuilder(100);
         final String confPath = System.getProperty(Constants.FESS_CONF_PATH);
         if (StringUtil.isNotBlank(confPath)) {
             buf.append(confPath);

src/main/java/org/codelibs/fess/util/DocList.java

@@ -0,0 +1,43 @@
+package org.codelibs.fess.util;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Map;
+
+public class DocList extends ArrayList<Map<String, Object>> {
+
+    private static final long serialVersionUID = 1L;
+
+    private long contentSize = 0;
+
+    private long processingTime = 0;
+
+    public void clear() {
+        super.clear();
+        contentSize = 0;
+        processingTime = 0;
+    }
+
+    public long getContentSize() {
+        return contentSize;
+    }
+
+    public void addContentSize(long contentSize) {
+        this.contentSize += contentSize;
+    }
+
+    public long getProcessingTime() {
+        return processingTime;
+    }
+
+    public void addProcessingTime(long processingTime) {
+        this.processingTime += processingTime;
+    }
+
+    @Override
+    public String toString() {
+        return "DocList [contentSize=" + contentSize + ", processingTime=" + processingTime + ", elementData="
+                + Arrays.toString(toArray(new Map[size()])) + "]";
+    }
+
+}

src/main/java/org/codelibs/fess/util/InputStreamThread.java

@@ -70,7 +70,7 @@ public class InputStreamThread extends Thread {
     }
 
     public String getOutput() {
-        final StringBuilder buf = new StringBuilder();
+        final StringBuilder buf = new StringBuilder(100);
         for (final String value : list) {
             buf.append(value).append("\n");
         }