使用camel（Talend）存档java电子邮件

Question

我的要求是，在阅读电子邮件后，我需要把它归档为PDF（目前，我们考虑纯文本，不包括图像中嵌入的文本）。p>

下面是我从Talend ESB生成的代码路径（我认为这是解释的关键）

当我执行这个时 java.lang.IllegalStateException: Cannot read while there is an open stream writer

        from(
            "imaps://imap.gmail.com:993" + "?username=" + context.username
                    + "&password=" + decryptedPassword_cMail_1
                    + "&contentType=text/plain" + "&" + "peek" + "=true"
                    + "&" + "handleFailedMessage" + "=true" + "&"
                    + "skipFailedMessage" + "=true" + "&"
                    + "mapMailMessage" + "=true")

    .routeId("WriteAsPDF_cMail_1")
            .process(new org.apache.camel.Processor() {
                public void process(org.apache.camel.Exchange exchange)
                        throws Exception {
                    Map<String, Object> map = new java.util.HashMap<String, Object>();

                    map = exchange.getIn().getHeaders();
                    for (String name : map.keySet()) {
                        String key = name.toString();
                        String value = map.get(name).toString();
                        System.out.println(key + " " + value);

                    }
                    String M_Body = exchange.getIn().getBody().toString();
                    org.apache.pdfbox.pdmodel.PDDocument document = new org.apache.pdfbox.pdmodel.PDDocument();

                    org.apache.pdfbox.pdmodel.PDPage page = new org.apache.pdfbox.pdmodel.PDPage();

                    document.addPage(page);
                    org.apache.pdfbox.pdmodel.font.PDFont pdfFont = org.apache.pdfbox.pdmodel.font.PDType1Font.HELVETICA_BOLD;
                    org.apache.pdfbox.pdmodel.PDPageContentStream contentStream = new org.apache.pdfbox.pdmodel.PDPageContentStream(
                            document, page);
                    contentStream.beginText();
                    contentStream.setFont(pdfFont, 12);
                    contentStream.moveTextPositionByAmount(100, 700);
                    contentStream.drawString(M_Body);
                    document.save("C:/Hari/poller/zipper/BlankPage.pdf");
                    contentStream.close();
                    document.close();
                }

            }).id("WriteAsPDF_cProcessor_1");
}

============================================

例外情况详情：

[WARN ]: org.apache.camel.component.mail.MailConsumer - Exchange failed, so rolling back message status: Exchange[MailMessage@0xcdf6432] java.lang.IllegalStateException: Cannot read while there is an open stream writer at org.apache.pdfbox.cos.COSStream.createRawInputStream(COSStream.java:129) at org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1177) at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:372) at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:561) at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObjects(COSWriter.java:490) ... ..... .. .. [ERROR]: org.apache.camel.processor.DefaultErrorHandler - Failed delivery for (MessageId: ID-EINLW2ABC-60843-1468402879061-0-1 on ExchangeId: ID-EINLW2ABC-60843-1468402879061-0-2). Exhausted after delivery attempt: 1 caught: java.lang.IllegalStateException: Cannot read while there is an open stream writer

我确实检查了其他类似的问题，但我找不到能帮助我解决问题的方法